what are the sequences of the newly synthesized dna strands the gene for cystic fibrosis has been isolated
Answers
Health Features of Cystic Fibrosis Patients with a Nucleotide Sequence Variant in Their Genotype and Functional Analysis of This Variant.
How was the gene responsible for cystic fibrosis found?In 1989, geneticist Lap-Chee Tsui and his research group discovered the gene linked to cystic fibrosis, the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) (CF).
When you have cystic fibrosis, what happens to the DNA?The normal synthesis or operation of the CFTR protein, which is present in the cells of the lungs and other regions of the body, can be affected in CF patients by mutations in the CFTR gene. One example of a recessive disease is cystic fibrosis.
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Related Questions
Which type of general sense receptor detects pressure changes in walls of blood vessels and in portions of the digestive, reproductive and urinary tracts
Answers
The type of general sense receptor that detects pressure changes in the walls of blood vessels and in portions of the digestive, reproductive, and urinary tracts is known as baroreceptors.
General sense receptors are the sensory receptors that are scattered throughout the body. These receptors are responsible for detecting stimuli that are generally not covered by the other specialized senses. General sense receptors are distributed in the skin, connective tissues, and viscera.BaroreceptorsThe receptors that detect pressure changes are called baroreceptors. The main function of baroreceptors is to monitor blood pressure. They detect changes in blood pressure and send information to the central nervous system to help maintain homeostasis.
Baroreceptors are located in the walls of certain blood vessels, such as the aorta, carotid artery, and some veins. In addition, they are found in various parts of the digestive, reproductive, and urinary tracts.Baroreceptors send nerve impulses to the medulla oblongata, which is the control center for the autonomic nervous system. The medulla oblongata then adjusts heart rate and blood pressure in response to the feedback from the baroreceptors.
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Corn snakes show variety in their skin color pattern. While the complete genetics of corn
snake color are complex, the most common colors on normal corn snakes—red and
black— are each coded by one gene.
For the red gene, the allele for the presence of red pigment (R) is dominant and the allele
for the absence of red pigment (r) is recessive. Likewise, for the black gene, the allele for
the presence of black pigment (B) is dominant and the allele for the absence of black
pigment (b) is recessive.
a. Draw the Punnett square for the cross of a snake that is homozygous dominant for
the red color with a snake that is heterozygous for the red color. What percentage
of the offspring is expected to have red pigment in their skin?
b. Draw the Punnett square for the cross of two snakes that are heterozygous for the
black color. What percentage of the offspring are expected to have black pigment
in their skin?
c. The parent snakes in part (b) that are heterozygous for black color are both
homozygous recessive for the red gene. Each parent has genotype rr for the red
gene. Based on this information, what percentage of their offspring are expected
to lack both the red and black pigments in their skin? Explain your reasoning.
Answers
Answer:
a. Punnett square for the cross of a snake that is homozygous dominant for the red color (RR) with a snake that is heterozygous for the red color (Rr):
```
| R | R |
----------------
| RR | RR | RR |
----------------
| Rr | Rr | Rr |
```
In this cross, all the offspring (100%) will have the red pigment in their skin because the presence of red pigment (R) is dominant over its absence (r).
b. Punnett square for the cross of two snakes that are heterozygous for the black color (Bb):
```
| B | b |
----------------
| BB | BB | Bb |
----------------
| Bb | Bb | bb |
```
In this cross, 75% of the offspring are expected to have black pigment in their skin (BB and Bb genotypes), and 25% of the offspring are expected to lack black pigment (bb genotype) due to the absence of the dominant black allele (B).
c. Both parent snakes are homozygous recessive for the red gene (rr), meaning they lack the red pigment. Since the red gene and black gene are independent of each other, the absence of red pigment does not affect the inheritance of the black pigment. Therefore, the percentage of offspring expected to lack both red and black pigments in their skin would be the same as the percentage of offspring lacking the black pigment (bb genotype) in the Punnett square from part (b). Thus, 25% of their offspring are expected to lack both the red and black pigments in their skin.
more primate species probably existed in the past than are alive today. true or false?
Answers
True, more primate species probably existed in the past than are alive today. There is evidence that more primate species existed in the past than are alive today.
This is due to factors such as evolution, natural selection, and extinction events, which have caused some primate species to evolve into new species, adapt to different environments, or become extinct over time.
As a result, the total number of primate species in the past was likely higher than the number of species currently alive.
Fossil records and genetic studies have shown that primate diversity has decreased over time, with some species becoming extinct due to climate change, habitat destruction, or competition with other species.
Additionally, new primate species continue to be discovered, further supporting the idea that primate diversity was greater in the past.
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Which of the following would be an effect of a hurricane on an ecosystem?
O A forest fire burns the plantlife close to the ground.
O The salt concentration in an area of water increases due to an influx of seawater.
O Plant life dies due to a lack of available water.
O A hard freeze kills the local plantlife in a forest ecosystem.
Answers
Which protects the DNA of a virus?
Answers
Answer:
The capsid
Explanation:
It functions as a shell for the virus and its genome.
In some viruses, the capsid may also be surrounded by an outer envelope, which is derived from the host cell's membrane and contains viral proteins that are involved in the infection process. The envelope can further protect the virus from environmental stresses, such as changes in temperature or pH.
HURRY I NEED HELP PLEASE
Answers
Given the following strand of DNA, what is the complementary (second) strand of DNA?
CGT-GAT-CAG
Answers
Answer:
If i remeber correctly it would be CAG or CGT
Explanation:
QUICK ASAP PLS Certain bacteria live and grow on the roots of some plants and produce chemicals that are beneficial to the plants. Which of the following observations best supports the claim that this relationship is beneficial to the plants?
Group of answer choices
Plants with a higher amount of the bacteria on their roots have increased rates of survival and reproduction.
When the bacteria are removed from the plant roots and are grown in a laboratory setting, they fail to survive.
The population size of the bacteria varies greatly depending on the chemistry of the soil and the type of the plant.
The chemical produced by the bacteria can be created by humans and added to the soil where it reaches the roots of the plant.
Answers
Answer:
Explanation: Plants with a higher amount of the bacteria on their roots have increased rates of survival and reproduction.
Cellulose is to polysaccharide, as glucose is to
Answers
eukaryotic cells vc prokaryotic cells.
Answers
Eukaryotic cells are cells with a nucleus and membrane-bound organelles such as mitochondrion, chloroplast, and lysosome.
Prokaryotic cells, on the other hand, are much simpler and smaller cells when compared to eukaryotic cells. The cells are also without a nucleus nor membrane-bound organelles.
Both eukaryotic and prokaryotic cells have plasma membranes and ribosomes that function in the maintenance of homeostasis and as sites of protein synthesis respectively.
Some eukaryotic cells such as the plant cells have cell walls just like the prokaryotic cells. Both cells have DNA, in addition to other biomolecules, which serves as a store of genetic information.
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Please Help!!! Which two body systems are most affected when a person is participating in a long jump?
A. endocrine and digestive
B. endocrine and muscular
C. skeletal and digestive
D. skeletal and muscular
Answers
The two-body systems that are most affected when a person is participating in a long-jump are skeletal and muscular (Option D).
The muscular system is composed of three different types of muscles: smooth muscle, cardiac muscle and skeletal muscle.The skeletal muscles are muscles responsible for controlling voluntary movements (e.g., jump) and they are attached to the skeleton by a type of connective tissue known as tendon.The skeletal system is composed of all bones of the body and they are responsible to provide support and protection to the internal organs.In conclusion, the two-body systems that are most affected when a person is participating in a long-jump are skeletal and muscular (Option D).
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Which protects Earth from harmful radiation from the sun?
A. convection currents
B. magnetosphere
C. Earth's atmosphere
D. hydrogen atoms
I WILL GIVE BRAINEST TO WHO GIVES ME THE RIGHT ANSWER
PLLLLLLLLLZ HELP
Answers
The earth's atmosphere protects the earth from the harmful ultraviolet radiation of sunlight coming from the sun. The ozone layer present in the earth's atmospheric region provides protection.
Which atmospheric layer protects from ultraviolet rays from the sun?The stratosphere layer is situated 6-20 km from the earth's surface right above the troposphere and below the mesosphere layer. It is mainly involved in the protection of the earth's environment from the radiation of the sunlight. As the ozone layer is present in this region.
The ozone layer is mainly the layer that protects from the ultraviolet radiation of sunlight. This ozone layer is at a greater risk of damage as the automobile fuel, and cooling appliances release CFC carbon.
The CFC carbon is very stable it reaches the ozone layer due to its stability but here due to photon energy, the CFC breaks down and releases chlorine. the chlorine then reacts with ozone and breakdown the ozone layer.
Thus, Earth's atmosphere is primarily involved in the protection, from the harmful radiation of the Sun.
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What is one function of proteins?
Answers
Answer:
. It helps repair and build your body's tissues, allows metabolic reactions to take place and coordinates bodily functions.
Explanation:
Which of the following evidence supports the close evolutionary relationship between birds and other reptiles? (more than one answer)
Birds and other reptiles share a common ancestor.
Bords and other reptiles are ectothermic.
Birds and other reptiles lay their eggs on land.
Birds are the descendants of reptiles.
Answers
The evidence supporting the close evolutionary relationship between birds and other reptiles includes the following:
1. Birds and other reptiles share a common ancestor. 2. Birds and other reptiles lay their eggs on land. 3. Birds are the descendants of reptiles.
Birds and other reptiles share a common ancestor and birds being the descendants of reptiles indicates their close evolutionary relationship. Additionally, both birds and reptiles laying their eggs on land is a shared characteristic supporting their relatedness. Yet it is incorrect to say that "Birds and other reptiles are ectothermic," as birds are endothermic (warm-blooded), which sets them apart from other reptiles.
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Hich situation would most likely be the concern of a biologist? the need for a hover car crop loss from fungus slow chips for handheld computers new mirrors for a telescope in space
Answers
The situation that would most likely be the concern of a biologist is crop loss from fungus. Biologists study living organisms, including plants, and often work to understand and address issues related to crop health and diseases, such as fungal infections, bacterial infections and viral infections.
Thus, fungal infections can damage the plant leading to the loss of yield which can directly affect the farmers growing them. Research is going on to manufacture pesticides and resistant crops that can withstand these fungal infections. Some common fungal infection that can cause major crop loss includes mildews, leaf spots, leaf wilts and blights. Thus a biologist will be more concerned about the crop loss from fungus rather than handheld computers new mirrors for a telescope in space.
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During what part of the m phase are chromatids separated and sorted so that each daughter cell eventually receives the same complement of chromosomes?.
Answers
During the Anaphase of the m phase chromatids are separated and sorted so that each daughter cell eventually receives the same complement of chromosomes.
What happens during Anaphase?The real nuclear and cell division that occurs during mitosis, also known as the M phase, occurs when the duplicated chromosomes are equally divided between two progeny cells.Sister chromatids separate and centromeres split during anaphase. The shortening of the spindle fibers causes the sister chromatids to separate. This is similar to using a shorter fishing line to reel in a fish. Both sister chromatids travel to the cell's poles, one going to one and the other to the other. Each pole of the cell has a full complement of chromosomes at the conclusion of anaphase.To learn more about Anaphase visit:
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Which statement below best describes the role of mutations in evolution by natural selection?
A Mutations increase the genetic variation within a population, and each of the variants provides an advantage under different circumstances
B Mutations increase the genetic variation within a population, and some of the variants may provide an advantage to individuals over time
C Mutations help stabilize the genetic variation within a population, and only one or two variants generally provide an advantage to individuals.
D Mutations help reduce the genetic variation within a population, and thus increasing the rate that new adaptations develop.
Answers
Answer:
B. Mutations increase the genetic variation within a population, and some of the variants may provide an advantage to individuals over time
The role of mutations in evolution by natural selection is option b. Mutations increase the genetic variation within a population.
Role of mutation in evolution:The mutation is significant as the first step of evolution since it developed the new DNA sequence for the specific gene that developed the new allele.
Also, at the same time, it rise the genetic variation within the population also it provides as an advantage to individual
hence, the option b is correct.
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Explain long and short autonomic fibers. Give a specific example of each. Follow the path for both motor and sensory for your examples.
Answers
Autonomic fibers are nerve fibers that make up the autonomic nervous system (ANS), which controls the involuntary actions of organs and tissues throughout the body. These fibers are classified into two types: long autonomic fibers and short autonomic fibers.
Long autonomic fibers originate from the thoracic and lumbar regions of the spinal cord and synapse with ganglia located closer to the target organs. This is known as the sympathetic division of the ANS. An example of long autonomic fibers is the preganglionic neuron that releases acetylcholine and synapses with postganglionic neurons in the adrenal medulla. The adrenal medulla then releases epinephrine and norepinephrine, which affect a variety of organs and tissues, including the heart, lungs, liver, and adipose tissue.
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As you may have realized, carbon-14 cannot be used to date our oldest fossils, because it has all decayed by the time we find them. To date our oldest fossils, we need to use both absolute and relative dating. We look for layers of volcanic ash that contain the radioactive isotope Potassium-40. This element has a half life of 1.25 billion years! Let’s say you’re a geologist, and in your sample you determine there to be 3.125% Potassium-40 left. What would the approximate age of that ask layer be?
Answers
The approximate age of the volcanic ash layer is approximately 6.25 billion years.
The approximate age of the volcanic ash layer containing Potassium-40 can use the concept of half-life and the percentage of Potassium-40 remaining.
Given that Potassium-40 has a half-life of 1.25 billion years, it means that after every 1.25 billion years half of the original amount of Potassium-40 decays.
Let's calculate the number of half-lives that have occurred based on the remaining percentage of Potassium-40:
Remaining percentage = 3.125%
Let's assume the initial amount of Potassium-40 was 100%.
After one half-life, the remaining percentage would be 50%.
After two half-lives, the remaining percentage would be 25%.
After three half-lives, the remaining percentage would be 12.5%.
After four half-lives, the remaining percentage would be 6.25%.
After five half-lives, the remaining percentage would be 3.125%.
Since the remaining percentage matches the given value of 3.125% can conclude that approximately five half-lives have occurred.
Since each half-life of Potassium-40 is 1.25 billion years, the approximate age of the volcanic ash layer can be calculated by multiplying the half-life by the number of half-lives:
Approximate age = 1.25 billion years/half-life × 5 half-lives
= 6.25 billion years
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In which part of the cell do ribosomes perform protein synthesis? (1 point)
lysosome
cytoplasm
vacuole
nucleus
Answers
According to the research, the correct option is nucleus. The part of the cell where ribosomes perform protein synthesis is in the nucleus.
What is the nucleus?It is a membranous structure that is located both in the plant cell and in the animal cell that houses most of the material belonging to genetics.
In this sense, it exerts control over the activities of cells and to preserve the integrity of genes, DNA molecules, proteins and ribosomes are organized in it, which will serve for protein synthesis.
Therefore, we can conclude that according to the research, the correct option is nucleus. The part of the cell where ribosomes perform protein synthesis is in the nucleus.
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Put the steps of the carbon cycle in order using Step 1 as your starting point. Step 1: Carbon dioxide is
taken in by plants during photosynthesis.
The cycle repeats when the carbon stored in the atmosphere as carbon dioxide gas is
taken in
The animal releases the carbon dioxide back into the atmosphere during respiration.
The animal eats a plant and uses its carbohydrates for energy.
DONE
Answers
Step 1: taken in by plants during photosynthesis.
Step 2: The animal eats a plant and uses it carbohydrates for energy.
Step 3: The animal releases the carbon dioxide back into the atmosphere during respiration.
Step 4: The cycle repeats when the carbon stored in the atmosphere as carbon dioxide gas is taken in.
Hope this helps!
Answer:
step four
step three
step two
Explanation:
In your own words, give a brief overview of the process of photosynthesis. Include where each phase place within a plant cell.
Answers
Answer:
Photosynthesis has two parts: the light-dependent reactions and the dark reactions (the Calvin cycle). Photosynthesis in a general sense, uses CO2 and water to create C6H12O6 (glucose) and oxygen. The light-dependent reactions use water to make oxygen, and a reduced energy carrier (NADPH) is also created. The Calvin cycle uses carbon dioxide and ATP to create G3P for glucose.
The light-dependent reactions occur on the membrane of the thylakoid and also involve shuttling electrons across different complexes (photosystem II and photosystem I), eventually causing ATP to be created with a proton gradient.
The light-independent reactions/Calvin cycle occur in the stroma of the chloroplast and also involve shuffling carbons around. Carbon dioxide is processed in three stages, and glucose is made from 6 CO2.
All cells come from cells it’s a 7 letter word what is it?
Answers
decided 19 × 1080 add that to 2097 + flip
what would be expected to happen if activation of the integrins on the surface of leukocytes was prevented?
Answers
D. all of these would be expected to happen if activation of the integrins on the surface of leukocytes is prevented.
Leukocytosis, or an abnormally high white blood cell count, can be caused by a variety of illnesses, including infections, inflammation, injury, and immune system problems. To rule out leukocytosis, a full blood count (CBC) is routinely conducted.
Consuming Vitamin C will aid in the regulation of your body's white blood cell levels. Vitamin C-rich fruits include lemons, oranges, and limes, as well as papayas berries, guavas, among pineapples. cauliflower, which is cabbage, carrots, broccoli, and bell peppers are all good sources of vitamin C.
Autoimmune and inflammatory illnesses, which lead the immune system to target healthy tissues, are two disorders associated with obtaining a high white blood count. Infections are caused by bacteria or viruses. Leukaemia and Hodgkin's disease are examples of cancers.
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Complete question:
What would be expected to happen if activation of the integrins on the surface of leukocytes is prevented?
A. The leukocytes would continue to roll from endothelial cell to endothelial cell.
B. The integrins would not be able to bind to ICAM on the surface of endothelial cells.
C. Extravasation would be prevented.
D. all of these
E. Tight binding between the leukocyte and endothelial cells would be prevented.
How are the vacuoles different in plant and animal cells
Answers
Answer:
vacuoles in plants provide a rigid structure for the plant cell
in animals,it just stores the waste materials and stuff.
describe a linear chromosome and how do linear chromosomes indicate common ancestry for all eukaryotes?
Answers
A linear chromosome is a structure that contains DNA and other proteins in eukaryotic cells. It consists of a long double-stranded DNA molecule that is wrapped around histone proteins to form a compact structure called chromatin. Linear chromosomes are unique to eukaryotes and are present in the nucleus of most eukaryotic cells.
Linear chromosomes indicate common ancestry for all eukaryotes because they are found in all eukaryotic organisms. This suggests that linear chromosomes were present in the last common ancestor of all eukaryotes and have been conserved throughout evolution. The presence of linear chromosomes is also an important characteristic that distinguishes eukaryotes from prokaryotes, which have circular chromosomes.
In addition, linear chromosomes provide a mechanism for genetic diversity through recombination and the exchange of genetic material during sexual reproduction. This process helps to maintain genetic variability within populations and allows for the evolution of new traits.
In summary, linear chromosomes are a defining feature of eukaryotic cells and indicate common ancestry for all eukaryotes. Their presence in all eukaryotic organisms suggests that they were present in the last common ancestor and have been conserved throughout evolution. Linear chromosomes also play a critical role in genetic diversity and evolution through recombination and sexual reproduction.
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According to the fluid mosaic model of membranes, membranes consist of:
1. a fluid phospholipid bilayer in which carbohydrates are embedded.
2. mainly phospholipids with scattered nucleic acids.
3. a fluid phospholipid bilayer in which proteins are embedded.
4. a lipid-protein sandwich
Answers
According to the fluid mosaic model of membranes, membranes consist of a fluid phospholipid bilayer in which proteins are embedded. Hence, the correct option is (3).
According to the fluid mosaic model, biological membranes are composed of a lipid bilayer with several proteins embedded inside them. Two layers of phospholipids with hydrophilic heads towards the aquatic environment and hydrophobic tails facing each other make up the lipid bilayer. The membrane's fluidity and elasticity are a result of this arrangement. The proteins that make up the membrane can have a variety of purposes, such as acting as receptors for signaling molecules or as channels through which chemicals can travel. Additionally frequently found on the membrane's exterior, where they are joined to lipids or proteins, carbohydrates are crucial for cell recognition and interaction.
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true or false? it is virtually impossible for a septic system to contaminate an underground aquifer
Answers
Which of the following statements is true?
a.Carbon-14 can only be used to date rocks.
b.Oxygen speeds the decay of dead organisms.
c.Epeirogenic changes deform the crust.
d.In turbite beds, the bottom layer is older than the top layer.
Answers
Explanation:
Oxygen speeds the decay of dead organisms. -is the true statement.
easy 20 points 1 quest
Answers
D, energy is transferred from producers to consumers
Explanation: Consumers, well, consume producers so that they can get energy. Therefore, the answer is D.
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