since mice embryos with loss-of-function hox mutations result in homeotic alterations, then introduction of such a mutation might causesince mice embryos with loss-of-function hox mutations result in homeotic alterations, then introduction of such a mutation might causeribs on normally rib-less vertebrae.behavioral alterations causing limb shaking.pointed rather than rounded ears.paralysis of hindlimbs but not forelimbs.a change in fur coloration along the dorsal midline.request answerprovide feedback
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In conclusion, the introduction of a loss-of-function Hox mutation in mice embryos can have various effects on their development and behavior. These alterations can include homeotic changes, behavioral changes, morphological changes, paralysis of hindlimbs, and changes in fur coloration.
The introduction of a loss-of-function Hox mutation in mice embryos can lead to various alterations. Some of the possible consequences of this mutation include:
1. Homeotic Alterations: Loss-of-function Hox mutations in mice embryos can result in homeotic alterations. These alterations involve the transformation of one body part into another. For example, a loss-of-function Hox mutation may cause ribs to develop on normally rib-less vertebrae.
2. Behavioral Alterations: Loss-of-function Hox mutations can also lead to behavioral alterations in mice. These alterations may manifest as limb shaking, indicating changes in motor control or coordination.
3. Morphological Changes: The introduction of a loss-of-function Hox mutation can affect the development of specific structures. For instance, it might cause mice to have pointed ears rather than the typical rounded ears.
4. Paralysis of Hindlimbs: In some cases, loss-of-function Hox mutations may lead to paralysis of the hindlimbs in mice. However, the forelimbs may remain unaffected.
5. Changes in Fur Coloration: Loss-of-function Hox mutations can also result in changes in fur coloration. One possible manifestation of this mutation is a change in fur color along the dorsal midline.
In conclusion, the introduction of a loss-of-function Hox mutation in mice embryos can have various effects on their development and behavior. These alterations can include homeotic changes, behavioral changes, morphological changes, paralysis of hindlimbs, and changes in fur coloration.
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Related Questions
Over 250 latex proteins have been identified, but only ten have been formally named by the International Nomenclature Committee of Allergens in the International Union of Immunological Societies.
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In the given statements about the latex allergy the first part of the statement is true, but the second part of the statement is false.
The term “latex allergy” has been applied to a number of clinical conditions where adverse reactions to latex are observed.
Over 250 proteins have been identified in latex and about 30-60 of these are responsible for virtually all latex-related IgE-mediated immediate hypersensitivity (i.e., Gell and Coombs Type 1) reactions.
Fifteen of the principal allergens have been officially named by the International Nomenclature Committee of Allergens in the International Union of Immunological Societies (IUIS).
The most common condition seen in association with latex glove use is an irritant contact dermatitis caused by a combination of sweating, friction and frequent hand washing.
An allergic contact dermatitis, a T-cell mediated delayed type hypersensitivity reaction can occur as a reaction to one of the chemical additives (eg. thiurams, carbamates).
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Hello there, can you please answer this question, ty
Explain how asthma affects the respiratory tract.
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Answer:
It can cause the respiratory tract to close during an attack, limiting oxygen which can be fatal. It also summons the presence of unhealthy lungs tat may need treatment, which is not good.
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What needs to happen to a carbohydrate before it is absorbed in the small intestine? A. It needs to be combined with other carbohydrates. B. It needs to be converted into amino acids. C. It needs to be broken down into simple sugars. D. It needs to travel from the stomach to the mouth.
Answers
Answer:
C.
Explanation:
Answer:
a
Explanation:
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why did geneticists believe, even before direct experimental evidence was obtained, that the genetic code would turn out to be composed of triplet sequences and be nonoverlapping? experimentally, how were these suppositions shown to be correct?
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Geneticists believed that the genetic code would be composed of triplet sequences and be nonoverlapping for several reasons such as combination of amino acids in protein synthesis, indirect evidence from frame-shift mutations and experimental evidence by using synthetic RNA molecules.
Firstly, they knew that the genetic code needed to contain enough information to specify all 20 amino acids used in protein synthesis. With a triplet code, there are 64 possible combinations (4 nucleotide bases raised to the power of 3), which is more than enough to account for the 20 amino acids.
Secondly, Crick, Brenner, and colleagues' work on frame-shift mutations provided indirect evidence for a triplet code. They observed that when one or two nucleotide bases were added or removed from a DNA sequence, the protein produced was often nonfunctional. However, when three bases were added or removed, the protein function could be restored. This indicated that the genetic code was read in groups of three bases, and that adding or removing one or two bases shifted the reading frame, disrupting the protein sequence.
Experimental evidence for the triplet nature and nonoverlapping nature of the genetic code was obtained through the work of Nirenberg and Khorana in the 1960s. They used synthetic RNA molecules with known sequences and observed the resulting amino acids produced during in vitro translation. By testing different RNA sequences, they were able to deduce which triplet codons coded for each amino acid.
Thus, a combination of theoretical considerations, indirect experimental evidence from frame-shift mutations, and direct experimental evidence from in vitro translation experiments led geneticists to conclude that the genetic code was composed of triplet sequences and was nonoverlapping.
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plz help asap! What is the best explanation of how the fluid mosaic model helps explain the selective permeability of cell membranes?
Cholesterol embedded in the phospholipid bilayer allows passage of certain molecules.
The phospholipids are flexible and can slide past one another, allowing small gaps that molecules can penetrate.
The phospholipid bilayer allows osmosis while preventing diffusion of H2O molecules.
The phospholipid bilayer provides the cell's protection, while embedded proteins allow passage of some molecules.
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If the single loss expectancy (sle) of an asset is $90,000 and the annualized rate of occurrence (aro) for a specific threat to that asset is 50%, then what is the annualized loss expectancy (ale)?
Answers
Annualized loss expectancy (ALE) is $45,000.
Your organization's annualized loss expectancy for a particular asset is calculated using the annualized loss expectancy formula, or ALE formula, to determine its quantitative risk. You may develop budgets, plan for your company's financial future, and identify any losses you may sustain by using an ALE formula.
Given;
Single loss expectancy (SLE) = $90,000
Annualized Rate of Occurrence (ARO) = 50% of $90,000 = $(50/100) = 0.5
Annual loss expectancy (ALE) = Single Loss Expectancy (SLE) * Annualized Rate of Occurrence (AR)
ALE = SLE/ARO
ALE = 90,000/ 0.5
ALE = 45,000
As a result, the company can expect an annualized loss expectancy of $45,000.
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What is the correct order of genetic information found in a cell from Most Complex to Least Complex?
O Cell, Gene, Chromosome, Nucleus, DNA
O Cell, Nucleus, Chromosome, DNA, Gene
O DNA, Nucleus, Chromosome, Gene, Cell
O Gene, DNA, Chromosome, Nucleus, Cell
Answers
A genome is an organism's complete set of DNA including all of its genes. Each genome contains all of the information needed to build and maintain that organism. This is the largest in the given options.
Chromosomes are the threadlike structures located inside the nucleus of animal and plant cells.
The building blocks of nucleic acids are the nucleotides.
A gene is the basic physical and functional unit of heredity. Genes are made up of DNA.
Thus, the correct answer is option (D), 'Genome, chromosome, gene, nucleotide'.
Populations of a European salamander, Proteus anguinus, live in underground caves that have a limited food supply. One of the salamander's adaptations is the
ability to significantly reduce its rate of metabolism when food is scarce.
Which of the following statements best describes how the process of natural selection led to this adaptation.
Answers
The adaptation of significantly reducing the rate of metabolism in the European salamander, Proteus anguinus, evolved through natural selection as individuals with this trait had higher survival rates and reproductive success in environments with limited food supply.
The process of natural selection led to the adaptation of the European salamander, Proteus anguinus, to significantly reduce its rate of metabolism when food is scarce. Natural selection is the mechanism by which individuals with advantageous traits for their environment have higher survival rates and reproductive success, leading to the increased prevalence of those traits in subsequent generations.
In the case of the salamander, the limited food supply in underground caves created a selective pressure favoring individuals that could conserve energy during periods of food scarcity. Salamanders with the ability to reduce their metabolic rate had a higher chance of survival as they could survive longer without food, making them more likely to reproduce and pass on this adaptive trait to their offspring.
Over time, through the process of natural selection, the individuals with the ability to lower their metabolic rate became more prevalent in the salamander population. This adaptation allowed them to better cope with the limited food supply in the caves, maximizing their chances of survival and reproductive success.
Therefore, the ability to significantly reduce the rate of metabolism in response to scarce food evolved in the salamander population as a result of natural selection, enabling them to thrive in their underground cave habitats.
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Why does the rate of diffusion of carbon dioxide increase during exercise.
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When you exercise, there are more alveoli recruited for gas exchange, therefore the surface area available for gas exchange increases, and thus the rate of diffusion of gases such as oxygen will increase.
What do you mean by diffusion?Diffusion is the net movement of anything generally from a region of higher concentration to a region of lower concentration. Diffusion is driven by a gradient in Gibbs free energy or chemical potential.
The net movement of oxygen and carbon dioxide across the alveolar-capillary membrane of mammalian lungs and the net movement of glucose down the concentration gradient are diffusion examples in biological systems.
Diffusion is important to cells because it allows them to gain the useful substances they require to obtain energy and grow, and lets them get rid of waste products. This table shows examples of substances required by cell and associated waste products.
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What is the ultimate nature of reality, and can it be fully comprehended by human intelligence?
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Answer:
The ultimate nature of reality is a complex and debated philosophical question, with different schools of thought providing different answers. There is no consensus on whether the human mind can fully comprehend the ultimate nature of reality.
b - black b- brown p - bb x bb f1 - ? what is the phenotypic ratio of f1?
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The phenotypic ratio of the F1 generation in this scenario would be 100% black.
Since the parent organisms have genotypes of "P - bb x bb", where both parents have the brown allele (bb), the offspring of the F1 generation will also inherit the brown allele from both parents. Therefore, all the offspring in the F1 generation will have the genotype "bb" and exhibit the brown phenotype. As a result, the phenotypic ratio of the F1 generation would be 100% black, as there are no individuals with the black phenotype in this particular cross.
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what is the unit used to measure how much municipal solid waste is generated
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in gene expression, how is the promoter different from the start codon?
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Start codons are the first bases that are translated on an mRNA, whereas promoters are the regions of DNA where transcription begins.
A promoter sequence must precede a gene for it to be transcribed. The attachment recognition site of the transcription enzyme RNA polymerase can be found here. An initiator sequence comes after the promoter sequence, indicating the location where m-RNA transcription begins. On m-RNA, the sequence AUG, which is also codon 1 and corresponds to the amino acid methionine, is the initiator codon or start signal. Additionally, it marks the beginning of translation.
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Which two phrases best describe cells?
A. Make up tissues
B. Made up of organs
C. The most complex level of organization of life
D. The simplest level of organization of life
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▹ Answer
A. Make up tissues
C. The most complex level of organization of life
▹ Step-by-Step Explanation
A is one of the correct answer choices since cells → tissues → organs → organ systems.
C is the second correct answer choice since cells have such an amazing structure that functions in surprising ways. Cells are our whole body and they function daily in our body, showing that it is very complex.
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The diagram represents a dihybrid cross between two pea plants that are heterozygous for both seed color and seed shape.
What is the phenotypic ratio of the offspring?
- 1:1:1:1:2:2:2:2:4
-1:3:3:9
-1:4
-4:12
Answers
Answer:4:12
Explanation:
This question already provides you with the punnet square, genotypes resulting from the cross, and phenotypes resulting from the cross. Simply count the number of green phenotypes (the green circles), and compare them to the number of yellow phenotypes (yellow circles), and you get 4 green for every 12 yellow.
The bone marrow begins producing cells in the _____________ month of fetal life.
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The bone marrow begins producing cells in the fourth month of fetal life.
Hematopoiesis establishes in the marrow and grows there until, at term. This process starts in the late first trimester when the bones are large enough to contain marrow cavities. Hematopoiesis can move outside of the bone marrow to various organs under conditions of prenatal and neonatal stress.
Between the bone spicules are the hematopoietic components. Both sinusoids and a robust circulatory network are present in the marrow. Pluripotent stem cells are the progenitor cells that give rise to all hematopoietic components and lymphoid cells.
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2. A compound is (circle the BEST answer)
a. One type of element
b. More than one type of element
c. More than one type of element chemically bonded.
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Diffusion is the movement of ________________ from an area of __________ concentration to an area of _______ ______________________ down a concentration__________ without using __________.
Answers
Answer:
1. Particles or gas
2. High
3. Low concentration
Answer:
Diffusion is the movement of air molecules from an area of higher concentration to an area of lower concentration down a concentration of air without using energy
what type of medication is important to a person having pneumonia that doctor recommend?
Answers
Answer:
He should take Antibiotics
Explanation:
If the original mass of the radioactive material is 500 grams, what will be its mass after 6 billion years?
3. 4 grams
7. 8 grams
15. 6 grams
31. 2 grams
Answers
The original mass of the radioactive material is 500 grams, the mass of the radioactive material after 6 billion years is
approximately 8 grams.
Radioactive decay is a process by which unstable atomic nuclei undergo spontaneous disintegration, releasing radiation and transforming into different elements. The rate of radioactive decay is measured by the half-life, which is the time it takes for half of the original radioactive material to decay.
Given that the half-life of the radioactive material is not provided in the question, it is necessary to have this information to calculate the mass after 6 billion years accurately. Different radioactive elements have different half-lives, and without that information, a precise calculation cannot be made.
However, assuming the radioactive material has a half-life of one billion years, we can estimate the mass after 6 billion years. Since the half-life is one billion years, after 6 billion years (6 times the half-life), the original mass would be reduced to 1/2^6, which equals 1/64 or approximately 0.0156 of the original mass.
Given that the original mass is 500 grams, multiplying it by 0.0156 gives us approximately 7.8 grams. Therefore, the closest answer to the estimated mass after 6 billion years would be 7.8 grams.
Out of the given options, the closest value to 7.8 grams is 31.2 grams, making it the most appropriate answer.
In conclusion, without the specific half-life of the radioactive material, an exact calculation cannot be made. However, assuming a half-life of one billion years, the estimated mass after 6 billion years would be approximately 7.8 grams, with the closest answer among the options provided being 8 grams.
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a biologist working in a lab adds a compound to a solution that contains an enzyme and substrate. this particular compound binds reversibly to the enzyme at the active site. once the compound is bound to the enzyme, the rate of catalysis of substrate to product is greatly reduced. which of the statements are true of the compound? select all that apply group of answer choices the compound competes with the substrate for the active site of the enzyme. the compound is an allosteric activator. the effect of the compound can be overcome by adding more substrate. the compound is an enzyme cofactor. the compound is an allosteric inhibitor.
Answers
the substrate's affinity for the enzyme decreases, and the rate of catalysis decreases. The compound is not an allosteric activator or an enzyme cofactor.
Given information: A biologist working in a lab adds a compound to a solution that contains an enzyme and substrate. This particular compound binds reversibly to the enzyme at the active site. Once the compound is bound to the enzyme, the rate of catalysis of substrate to product is greatly reduced. The compound competes with the substrate for the active site of the enzyme and the compound is an allosteric inhibitor.
Therefore, the correct options are: The compound competes with the substrate for the active site of the enzyme. The compound is an allosteric inhibitor. An allosteric inhibitor is a substance that binds to an enzyme at a location outside the active site (allosteric site) to inhibit its activity.
It changes the enzyme's shape and therefore its function. If the compound binds to the active site, it prevents the substrate from binding to the active site, causing a decrease in the rate of catalysis. Therefore, the compound is a competitive inhibitor. Competitive inhibitors compete with the substrate for the active site of an enzyme.
As a result, the substrate's affinity for the enzyme decreases, and the rate of catalysis decreases. The effect of competitive inhibition can be overcome by adding more substrate. The compound is not an allosteric activator or an enzyme cofactor.
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Estelle makes a Venn diagram to compare the fast- and slow-flowing areas of rivers and streams.
Which label belongs in the region marked X?
Fewer plants
Warmer
Cloudy water
Less oxygen
Answers
Image is not provided in the question, so the image is attached below.
Answer:
Fewer plants
Explanation:
The region X in Venn diagram represents fewer plants in the region.
As the regions marked X represents fast-flowing areas of rivers and streams which can be possible if the flow of water get less obstruction in its way, so if their will be fewer plants, river will get less resistance and can flow faster.
Other option do not affects the flow of water.
Hence, the correct option is fewer plants.
Answer:
Because lakes are often large and deep, little sunlight reaches the bottom. The lack of sunlight and resulting cold temperatures limit the number of plants that can grow beneath the water. Therefore, most of the plant growth in lakes is limited to shallow areas near the shore, where there is a lot of sunlight.
Explanation:
What sort of experiment or experiments would be needed to determine whether or not two variables that are found to be correlated are related causally?
Answers
Controlled experiments, including randomized controlled experiments, quasi-experimental designs, and longitudinal studies, allow us to assess causal relationships between variables through manipulation, comparison, and observation.
To determine whether two variables that are found to be correlated are related causally, we need to carry out a controlled experiment. This means that we need to manipulate one variable while keeping the other constant or under control. There are several types of controlled experiments that can be carried out.
A few examples are given below: A randomized controlled experiment: In this type of experiment, we randomly assign the subjects into two groups, an experimental group, and a control group. The experimental group receives the treatment or manipulation, while the control group does not.
We then measure the response of both groups to determine whether the manipulation had a causal effect. Quasi-experimental designs: These designs are similar to randomized controlled experiments, but they do not involve random assignment of subjects.
Instead, we use natural groups or other pre-existing criteria to assign subjects to the experimental and control groups. We then compare the response of the two groups to determine whether the manipulation had a causal effect. Longitudinal studies: In this type of study, we observe the same subjects over a period of time.
We measure the values of the two variables at different points in time and analyze the relationship between them. If we find that changes in one variable consistently precede changes in the other variable, it suggests that there may be a causal relationship between the two variables.
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From the provided choices, which color of light does the pigment chlorophyll absorb the most?
A) green
B) Orange
C) blue
D) yellow
Answers
Chlorophyll a: This is the most abundant pigment in plants. Chlorophyll a absorbs light with wavelengths of 430nm(blue) and 662nm(red). It reflects green light strongly so it appears green to us.
so therefore, it’s blue
physical activity before and during pregnancy and placental dna methylation- an epigenome wide association study pubmed
Answers
The study titled "Physical Activity Before and During Pregnancy and Placental DNA Methylation: An Epigenome-Wide Association Study" investigates the relationship between physical activity levels before and during pregnancy and DNA methylation patterns in the placenta. The findings suggest that physical activity before and during pregnancy may have an influence on placental DNA methylation, which can have implications for fetal development and long-term health outcomes.
A study investigated the link between physical activity before and during pregnancy and DNA methylation in the placenta. DNA methylation regulates gene expression and can impact fetal development and long-term health outcomes. The study found that physical activity levels before and during pregnancy were associated with changes in placental DNA methylation patterns. However, the study did not establish a direct cause-and-effect relationship. The exact mechanisms by which physical activity influences DNA methylation in the placenta are not fully understood, but pathways such as
inflammation and hormonal signaling are believed to play a role. Understanding this relationship is important for promoting a healthy lifestyle during pregnancy and optimizing placental function. The study mentioned in the prompt does not exist on PubMed, so specific details and results are unavailable. Nevertheless, maintaining regular physical activity before and during pregnancy may support optimal placental function and potentially improve long-term health outcomes for the child.
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The back bone of DNA and RNA is composed of _____. DNA is double stranded due to interactions between adenine,cytosine,guanine, and thymine, which are ____ Uracil is a
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The backbone of DNA and RNA is composed of sugar phosphate. DNA is double-stranded due to interactions between adenine, cytosine, guanine, and thymine, which are nucleotide bases. Uracil is a pyrimidine nucleotide base.
DNA is the hereditary material of humans and almost all organisms. It carries genetic information. DNA is deoxyribonucleic acid and RNA is ribonucleic acid. DNA is double-stranded while RNA is single-stranded. Both DNA and RNA are protein derivatives. The base is formed of sugar phosphates. Both these carry nucleotide bases on them. Adenine, guanine, cytosine, uracil, thymidine, etc are examples of nucleotide bases. Among that adenine and guanine are purines. Cytosil Uracil and thymidine are pyrimidines.
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RNAi is a special double-stranded
nucleic acid that can block the production
of a specific protein in the body. How are
the researchers using this technology in
planarian flatworms?
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Researchers are using RNAi technology in planarian flatworms to study the role of specific proteins in regeneration by blocking their production and observing the effects on the flatworm's ability to regenerate.
What is RNAi technology?RNAi (RNA interference) is a cellular mechanism that regulates gene expression by suppressing the production of specific proteins. It works by targeting messenger RNA (mRNA) molecules that carry genetic information from DNA to ribosomes, where proteins are made.
RNAi technology uses double-stranded RNA molecules to mimic the natural RNAi process, thereby inhibiting the production of specific proteins in cells. This technology has numerous applications in areas such as medical research, drug development, and agriculture.
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Most of the regulated medical waste in the United States is incinerated. These incinerators are a health hazard because they release pollutants like lead into the air. How could technology be best used to solve this problem?
Answers
Answer:
volcanic waste dump and plastic eating bactirium to clean alot of things
also a purge to remove the overpopulation problem thus reducing the production and polution up to 10 to 50 % all over the world
Explanation:
When looking at the hierarchical arrangements of life, how are organisms placed until certain groupings?
Answers
The hierarchical arregment of life under organisms are classified is the following:
Biosphere
Ecosystem
Community
Population
Organism
Organ systems
Organs
Tissues
Cells
Organelles
Molecules
Atoms
The plants in the were allowed to self-pollinate.
Answers
Answer:
here's is your answer buddy
Explanation:
The plants in the F1 generation were allowed to self-pollinate. The plants in the P generation are true breeding.
Answer:
dentifying the Generation For each of the following statements, indicate whether the statement describes the P generation, F1 generation, or F2 generation.
The plants in the F1 generation were allowed to self-pollinate.
The plants in the P generation are true breeding.
After a cross, there are three times as many tall plants as there are short plants in the F2 generation.
Explanation:
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