if a heterozygous parent (ab/ab) is test crossed to a homozygous recessive (ab/ab), what will the progeny phenotypic ratio be if genes a and b are completely linked?
Sorted independently?
a. 1AB: 1Ab: 1aB: 1ab
b. 9AB: 3Ab: 3aB: 1ab
c: 1AB:1ab
d: none of the above
Answers
If a heterozygous parent (Ab/aB) is test crossed to a homozygous recessive (ab/ab), and the genes are completely linked. If the genes sort independently, the progeny phenotypic ratio will be: a: 1AB: 1Ab: 1aB: 1ab
If genes a and b are completely linked, then they will sort together during meiosis and there will be no recombination events between them. Therefore, the progeny phenotypic ratio will depend on the genotype of the heterozygous parent.
If the heterozygous parent (ab/ab) is test crossed to a homozygous recessive (ab/ab), the possible gametes from the heterozygous parent are: Ab and aB. The gametes from the homozygous recessive parent are: ab.
Therefore, the possible progeny genotypes are: Ab/ab and aB/ab.
If genes a and b are sorted independently, the expected phenotypic ratio for a dihybrid cross between two heterozygous parents is 9:3:3:1. However, in this case, the genes are completely linked and there will be no recombination between them.
As a result, the progeny phenotypic ratio will be the same as the gametic ratio: 1 AB: 1 aB: 1 Ab: 1 ab.
Therefore, the correct answer is option a: 1AB: 1Ab: 1aB: 1ab.
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Related Questions
Evaluate the following statements about mushrooms. Select True or False for each statement.A diploid zygote is formed when a male spore fertilizes a female spore.a. Trueb. False
Answers
The statement is false, A diploid zygote is formed when a haploid sperm cell from the male fuses with a haploid egg cell from the female during fertilization.
In sexual reproduction, the fusion of a haploid sperm cell from the male and a haploid egg cell from the female results in the formation of a diploid zygote. The haploid sperm and egg cells each contain one set of chromosomes, which combine during fertilization to form a complete set of chromosomes in the zygote. The zygote then undergoes cell division and development to eventually form a mature organism.
The result is a diploid zygote with a complete set of chromosomes (two sets, one from each parent). Spores, on the other hand, are produced by some plants and fungi as a means of asexual reproduction, and they are typically haploid, containing only one set of chromosomes. Spores are not involved in the formation of a diploid zygote.
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Which of these is the most likely effect of the Industrial Revolution on peppered moths in the city?
Answers
Answer:
D
Explanation:
Since the trees became darker bc of the smoke of the factories, light colored moths can't camouflage on dark trees.
the name of Abraham father in the bible
Answers
Answer:
I believe it's Terah
Explanation:
yes and stuff I think so slay
Suppose a father and a mother claim that they have been given the wrong baby at the hospital. the mother belongs to group B, the child to AB, one possible father to B, the other to A. which man is the most probably father? who would be the most probable father if the mother belongs to group B, the child to O, the possible father to A and the other to AB?
Answers
Suppose a father and a mother claim that they have been given the wrong baby at the hospital. the mother belongs to group B, the child to AB, one possible father to B, the other to A. The most probable father in this scenario is the second possible father with blood type A. If the mother belongs to group B, the child to O, the possible father to A and the other to AB, so it is not possible for either possible father to be the biological father in this scenario.
In order to determine the most probable father in each scenario, we need to look at the blood type and alleles of each individual.
First scenario:
The mother has blood type B, which means she has the B allele. The child has blood type AB, which means they have both A and B alleles. One possible father has blood type B, which means he has the B allele. The other possible father has blood type A, which means he has the A allele.
To determine the most probable father, we need to consider the possible combinations of alleles that each father could contribute.
If the first possible father is the biological father, he would contribute the B allele. The mother would contribute the B allele. This would result in a child with blood type B, not AB.
If the second possible father is the biological father, he would contribute the A allele. The mother would contribute the B allele. This would result in a child with blood type AB.
Therefore, the most probable father in this scenario is the second possible father with blood type A.
Second scenario:
The mother has blood type B, which means she has the B allele. The child has blood type O, which means they do not have either A or B alleles. One possible father has blood type A, which means he has the A allele. The other possible father has blood type AB, which means he has both A and B alleles.
If the first possible father is the biological father, he would contribute the A allele. The mother would contribute the B allele. This would result in a child with blood type AB, not O.
If the second possible father is the biological father, he could contribute either the A or B allele, but either way, the child would have at least one of those alleles and therefore would not have blood type O.
Therefore, it is not possible for either possible father to be the biological father in this scenario.
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Human blood consist of blood groups A, B, & O. However, there is one more blood group, AB, which contains alleles A and B in the same genotype. What is this phenomenon called?
Answers
Answer:
codominant inheritance
Explanation:
edge
a waxy cuticle prevents desiccation. what is the cost of this adaptation?
Answers
The cost of the waxy cuticle adaptation is that it can also limit the exchange of gases, such as oxygen and carbon dioxide, which are necessary for photosynthesis.
This can reduce the rate of photosynthesis and growth in the plant.
Additionally, the production and maintenance of the waxy cuticle requires energy and resources, which could be allocated towards other functions such as reproduction or defense against herbivores.
However, overall, the benefits of the waxy cuticle in preventing desiccation outweigh the costs for most plants in arid or dry environments.
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Two fruit flies that are heterozygous for body color and eye color are crossed. Brown body color is dominant to black body color. Red eye color is dominant to brown eye color. Use the Punnett square to determine the ratio of offspring with: Brown body and red eyes Brown body and brown eyes : Black body and red eyes : Black body and brown eye.
Answers
The ratio of offspring that possess the following phenotype is as follows:
Brown body and red eyes: 9Brown body and brown eyes: 3Black body and red eyes : 3Black body and brown eye: 1This question involves two genes coding for body color and eye color in fruit flies respectively. The brown body color allele (B) is dominant over the black body color allele (b) in the first gene while the red eye color allele (R) is dominant over the brown eye color allele (r) in the second gene. In a dihybrid cross between two fruit flies that are heterozygous for both genes i.e. BbRr × BbRr, the allelic combinations of gametes produced by each parent fruit fly will be:BbRr- BR, Br, bR and brUsing these gametes to complete a punnet square (see attached image), 16 possible offsprings will be produced in a ratio 9:3:3:1 where;Brown body and red eyes (B_R_) : 9Brown body and brown eyes (B_rr) : 3 Black body and red eyes (bbR_) : 3Black body and brown eye (BbRr) : 1Hence, the ratio of the offsprings will be 9:3:3:1Learn more about punnet square at: https://brainly.com/question/14504341?referrer=searchResults
Answer:
9, 16, 3, 16, 3, 16, 1, 16
Explanation:
Brown body and red eyes ⇒ 9 ⇒ 16
Brown body and brown eyes ⇒ 3 ⇒ 16
Black body and red eyes ⇒ 3 ⇒ 16
Black body and brown eyes ⇒ 1 ⇒ 16
What is the melting point of a substance
Answers
depending on what it is for water it is 32°F
steel is 2500°F
aluminum 1,221°F
zinc is 787.2°F
sorry i cant put all the melting points
unless u mean
Melting point, temperature at which the solid and liquid forms of a pure substance can exist in equilibrium. As heat is applied to a solid, its temperature will increase until the melting point is reached. More heat then will convert the solid into a liquid with no temperature change.
In an experiment, the independent variable is the variable you change on purpose. The dependent variable is what you measure. True or false
Answers
Answer:
True
Explanation:
An independent variable is the variable you think is the cause,while a dependent variable is the effect. you manipulate the independent variable and measure the outcome in the dependent variable.
50 POINTS AND BRAINLEST!!!!!!!
What is the process by which living organisms convert energy from food into a form that can be used by the body's cells?
Answers
Answer:
Cellular respiration
Explanation:
Cellular respiration is the process by which the energy in food is converted into energy that can be used by the body's cells.
Answer: Cellular Respiration
Explanation:
When irrigating the ear, repeat the process until the return from the ear is ________.
Answers
The answer is clear solution.
When irrigating the ear, repeat the process until the return from the ear is clear solution.
What is ear irrigation?
Ear irrigation is a common technique used to flush away foreign objects and extra cerumen from the ear.
Wax is naturally secreted by the ear to lubricate and protect it, as well as to keep foreign objects out and prevent bacterial growth. The body regulates the quantity of earwax in the ears under normal circumstances. A blockage in the ear from excess or hardened earwax can result in earaches, ringing in the ears, or temporary hearing loss.
Why ear irrigation is done?
The ear is extremely sensitive, particularly the ear canal and eardrum. Over time, earwax buildup can harm these structures. Your hearing may suffer as a result. Ear irrigation is a secure method for removing extra earwax and lowering the danger of injury to the ear. Food particles, insects, or tiny stones can occasionally find their way into the ear. The objective in these situations is to promptly and safely remove the objects to prevent them from damaging the delicate canal or moving farther into the ear. It is possible to successfully remove foreign objects from the ear with ear irrigation.
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If neither chemical works what would you suspect is broken? explain your answer
Answers
Answer: If neither chemical work, the proteins that are likely “broken” are the ones after cGMP such as PKG or phosphor-proteins.
Explain the negative impact of deforestation, and also 2 ways Humans have made efforts to protect our planet's forestland in a short paragraph (4 or more sentences).
Answers
Answer:
See below.
Explanation:
Deforestation, the process of cutting down and clearing forests for other land uses, has numerous negative impacts on the environment. It contributes to climate change by releasing large amounts of carbon dioxide into the atmosphere, as trees absorb carbon dioxide and produce oxygen. Deforestation also leads to soil erosion, loss of biodiversity, and increased frequency and severity of natural disasters like floods and landslides. Additionally, deforestation destroys the habitats of countless species, which can lead to their extinction.
Fortunately, humans have taken steps to protect our planet's forestland. One way is through reforestation efforts, which involve planting new trees in areas where forests have been cleared. Another way is through conservation, which involves protecting existing forests and preventing further deforestation. Governments and environmental organizations have established protected areas and implemented policies and regulations to limit deforestation and promote sustainable land use practices. Additionally, there is a growing movement to promote the use of sustainable products, like recycled paper and wood products from sustainably managed forests, which can help reduce the demand for new products that contribute to deforestation.
Two males in the Ibex population competing for mating rights will fight. These two organisms are displaying which of the following social behaviors?
A.) Cooperation
B.) Altruism
C.) Social Hierarchy
D.) Agonistic
Answers
Answer:D
Explanation: it is fighting for a mate, it could lead to hierarchical classification after but this is solely for mating rights so D agonistic
the fundamental mechanism by which enzymes catalyze reactions is: a. they bind substrate just as a lock holds a key b. they utilize free energy from atp to convert substrate to product c. they stabilize the substrate of the reaction d. they stabilize the transition state of the reaction e. they stabilize the product of the reaction
Answers
A biological catalyst is an enzyme. Reactions' activation energies are reduced by catalysts. The rate of a reaction increases with decreasing activation energy. Enzymes accelerate processes by reducing activation energy.
The bonds holding together the atoms in molecules are ruptured, altered, and repaired during a chemical reaction, recombining the atoms to form new molecules. By lowering the activation energy, the energy hurdle that must be cleared for a chemical reaction to take place, catalysts improve the efficiency of this process. As a result, catalysts facilitate the formation of chemical bonds between atoms to create novel combinations and new compounds. Chemical reactions are accelerated and become more energy-efficient when catalysts are used. Additionally, catalysts possess a crucial quality known as selectivity that allows them to control an unwanted products.
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What animal in the animal kingdom were you most surprised was considered an animal?
Answers
Answer:
The Pig-nose frog
Explanation:
Personally, I find these animals creepily amazing. The pig-nose frog goes by a few names, starting with purple frog, Indian purple frog, and pig frog. It looks mostly like a blob-fish then a frog, really. "The pig frog is green or grey-green in color, with brown or black blotching. It has fully webbed feet, a sharply pointed nose, and large tympana (eardrums). It is easily mistaken for various other species of the genus Litho-bates , with which it shares its geographic range, including the American bullfrog." "The body of the purple frog appears robust and bloated and is relatively rounded compared to other more dorsoventrally-flattened frogs. Its arms and legs splay out in the standard anuran body form. Compared to other frogs, purple frogs have a small head and an unusual, pointed snout."
Consider the following two statements about succession.
Student 1:
Matthew - As succession begins, communities tend to be dominated by mostly K-selected species. As succession continues, r-selected species tend to compete better and therefore become more and more common.
Student 2:
Iman - As succession begins, communities tend to be dominated by mostly r-selected species. As succession continues, K-selected species tend to compete better and therefore become more and more common.
Which student is correct?
a. Provide a rationale for your answer (2 marks)
b. Provide a specific example of succession which includes at least one example of an r-selected and one example of a K-selected species. (1 mark)
Note - No marks are earned by simply agreeing with either Matthew or Iman
Answers
The lower epidermis is covered with cuticle.
O True
O False
Answers
Answer:
True
Explanation:
Tay sachs disease is caused by a mutation in the hexa gene. There are a number of mutations that are known to cause the symptoms of tay sachs. What kind of mutation is presented in this interactive?.
Answers
Tay Sachs disease is caused by a type mutation called frameshift mutation. It alters all protein sequence downstream of the mutation site.
What is a mutation?A mutation is any alteration in the genetic material (DNA) of the genome of a particular organism.
A frameshift mutation is a type of mutation capable of changing all the Open Reading Frame (ORF) of a protein, thereby altering its functional and structural properties.
Tay Sachs disease is caused by a frameshift mutation in the HEXA gene located on chromosome 15, which leads to a defective protein and faulty cellular transport of beta-hexosaminidase.
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What is the effect of an enzyme on the energy of a chemical reaction
Answers
Answer:
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
Explanation:
To treat agricultural wastewater, Jack has built a lagoon that gets oxygen from floating surface aerators or submerged diffusers. It requires less land space, is 6 to 20 feet deep, and has a detention time of 5 to 20 days. Which type of lagoon has Jack built?.
Answers
Jack has built a facultative lagoon. Facultative lagoons are wastewater treatment systems that utilize both aerobic and anaerobic processes to treat wastewater.
Facultative lagoons are wastewater treatment systems that utilize both aerobic and anaerobic processes to treat wastewater. They are typically deeper than other types of lagoons, ranging from 6 to 20 feet deep. The lagoon can receive oxygen through floating surface aerators or submerged diffusers, allowing for the presence of both aerobic and anaerobic bacteria.
The detention time of 5 to 20 days mentioned in the description is also characteristic of facultative lagoons. This refers to the amount of time the wastewater remains in the lagoon for treatment before being discharged.
Facultative lagoons are commonly used for the treatment of agricultural wastewater due to their effectiveness in removing organic matter and nutrients. They require less land space compared to other treatment methods and provide a relatively simple and cost-effective solution for wastewater treatment in agricultural settings.
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3) Choose the correct answer.
The study of the surface and interior of the Earth is called
O life science
O social science
Ophysical science
O Earth science
Answers
The study of the surface and interior of the Earth is called Earth science.
What is Earth science?Earth science is the scientific study of the Earth and its physical components, including its geology, oceans, atmosphere, and the processes that shape and change them over time. It encompasses a wide range of scientific fields, including geology, oceanography, meteorology, climatology, and environmental science.
Earth scientists use a variety of methods and tools, such as fieldwork, laboratory analysis, remote sensing, and computer modeling, to better understand the Earth's systems and processes, and to address pressing societal issues related to the planet's natural resources, hazards, and sustainability.
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This serves as a quick energy source.
a. carbohydrate.
b. nucleic acid.
c. lipid.
d. protein.
Answers
what is the necessary coenzyme for transamination reactions? select one: a. pyridoxal phosphate b. thiamine pyrophosphate c. coenzyme a d. nad
Answers
The necessary coenzyme for transamination reactions is pyridoxal phosphate (option A). Pyridoxal phosphate is a derivative of vitamin B6, which plays a crucial role in the metabolism of amino acids.
It acts as a coenzyme for transaminases, which catalyze the transfer of an amino group from an amino acid to a keto acid, forming a new amino acid and a new keto acid. Pyridoxal phosphate is required for the transamination of most amino acids, including those that are essential for human health. The coenzyme is necessary to stabilize the intermediates formed during the reaction and to facilitate the transfer of the amino group. Without pyridoxal phosphate, transamination reactions cannot occur, leading to a disruption in the metabolism of amino acids. Thiamine pyrophosphate, coenzyme A, and NAD are also important coenzymes in other metabolic reactions, but they are not involved in transamination reactions. In summary, pyridoxal phosphate is the necessary coenzyme for transamination reactions, and its absence can lead to serious metabolic disorders.
Transamination reactions play a crucial role in amino acid metabolism, as they facilitate the transfer of an amino group from one molecule to another. Pyridoxal phosphate, derived from vitamin B6, serves as a vital coenzyme in these reactions, enabling the conversion of amino acids into other essential metabolic intermediates. This process supports the synthesis of non-essential amino acids, as well as the generation of various compounds involved in energy production and other critical cellular functions.
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A student constructs a model using a fan and a pile of sand shaped like a dune. The student turns on the fan, observes the model for changes, and lists several conclusions in a chart.
1. Wind cannot erode landforms.
2. Wind can reduce the surface heights of landforms
3. Wind cannot transport materials
4. Wind cannot weather materials.
Answers
Answer: Im sorry i dont kno
Explanation:
Based on the observations of the sand dune model with a fan, the conclusions provided in the chart are incorrect. In reality, each statement's opposite is true.
What is Sand dune?A sand dune formed by wind or water flow is known as a sand dune. When there is a lot of loose sand present and the wind or water is powerful enough to shift the sand grains, sand dunes emerge. Beaches, deserts, and some riverbeds all contain sand dunes.
Based on the observations in the provided example, the following inferences are correct:
Landforms can be eroded by wind.Sand can be moved by wind and dumped elsewhere, altering the size and shape of landforms.Sand and other materials are transported from one location to another by wind, which is a significant agent of sediment transport.Materials can weather and degrade in the wind through abrasion and deflation.Therefore, the conclusions given in the chart are false based on the observations of the sand dune model.
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Why is it that cancer does not form every time there is a mistake during the cell cycle?
Answers
Answer:
Cells will actually kill themselves through a process called apoptosis, or it will be attacked and killed so it doesn’t spread. For example, when you are exposed to the sun for a long period of time, the solar radiation can mess with your skin cells. That’s why you get sunburned: the cells dry up and fall off. Otherwise, you could get skin cancer
The reason why cancers does not form every time there is a mistake during the cell cycle is explained below:
The following information should be considered:
Cells will actually kill themselves through a process called apoptosis, or it will be attacked and killed so it doesn’t spread. For example, when you are exposed to the sun for a long period of time, the solar radiation can mess with your skin cells. That’s why you get sunburned: the cells dry up and fall off. Otherwise, you could get skin cancerLearn more: brainly.com/question/16911495
list and explain the functions of different organelles of a generalized cell
Answers
Answer:
ransporting channels of the cell—— Endoplasmic Reticulum.
Powerhouse of the cell—— Mitochondria.
Packaging and dispatching unit of the cell—— Golgi Body.
Digestive bag of the cell—— Lysosomes.
Storage sacs of the cell—— Vacuole.
Kitchen of the cell—— Chloroplast.
Control room of the cell—— Nucleus.
hope it helps u mate
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Answer:
Explanation:
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Water is a common compound. It is a compound because it is made up of___ and oxygen.
A. Hydrogen
B. Carbon
C. Sodium
D. Chloride
Answers
Answer:
A
Explanation:
I know this will help :)
How is  eukaryotic RNA processed before leaving the nucleus 
Answers
Answer:
Messenger RNA, or mRNA, leaves the nucleus through pores in the nuclear membrane. ... During mRNA processing, the introns (non-coding regions) of the pre-mRNA are removed, and the exons (the coding regions) are spliced together. Additionally, a 5' cap and a 3' poly A tail are added to the pre-mRNA
Explanation:
This can be released during a chemical change
A fireworks
B chemical reaction
C chemical change
D energy
Answers
Answer:
chemical reaction might occur