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3 years ago

7) Which of the following is true about p53?

Biology

1 answer:

Kitty [74]3 years ago

7 0

Answer:

D. All of the above

Explanation:

P53 is a tumor protein. It is often referred to as the "guardian of the genome". It can stop the cell from growing, repairs DNA and controls cell death, which is called apoptosis. As the cell is cycle goes on, p53 stops the growth of the cell when there is an error or damage in the DNA. This action prevents the defective cell from replicating. The p53 then signals the production of proteins that repair DNA. If the DNA is not fixable, it programs apoptisis.

If by some chance that the p53 gene are mutated, then it cannot do those functions, which may result in cancer or the uncontrolled replication of defective cells.

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Indicate which of the following are criteria for maintaining a Hardy-Weinberg equilibrium. If the criteria is required select 't

Paladinen [302]

Answer:

- Populations must be very large -True

- The frequency of all genotypes must be equal. False

- Gene flow from other populations must be zero. True

- Matings must be random. True

- There should be no natural selection. True

Explanation:

The criteria for maintaining a Hardy-Weinberg equilibrium are:

Random matings: mating probabilities between individuals with determined genotypes depends on the products of frequencies of those genotypes.

No superposed generations: each individual can leave their gametes in the pool only once.

No mutations: There is no incorporation into the genetic pool of new gametes originated by mutation of preexistent alleles.

No migration: There is no incorporation of gametes originated in another population.

Infinite population size: the probabilities of randomly taking an A gamete from the pool are p and the probabilities of taking a B gamete from the pool are q.

No natural selection: Each individual has the same surviving and reproducing probabilities as any other, contributing proportionally to the gamete pool.

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