Which of the following provides an example of epistasis?

A) Recessive genotypes for each of two genes (aabb) results in an albino corn snake.

B) The allele b17 produces a dominant phenotype, although b1 through b16 do not.

C) In rabbits and many other mammals, one genotype (cc) prevents any fur color from developing.

D) In Drosophila (fruit flies), white eyes can be due to an X-linked gene or to a combination of other genes.

E) In cacti, there are several genes for the type of spines.

Question

Branden Schneider

Biology

30 May, 20:57

Which of the following provides an example of epistasis?

A) Recessive genotypes for each of two genes (aabb) results in an albino corn snake.

B) The allele b17 produces a dominant phenotype, although b1 through b16 do not.

C) In rabbits and many other mammals, one genotype (cc) prevents any fur color from developing.

D) In Drosophila (fruit flies), white eyes can be due to an X-linked gene or to a combination of other genes.

E) In cacti, there are several genes for the type of spines.

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Answers (1)

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Jack · Answer 1

D) In Drosophila (fruit flies), white eyes can be due to an X-linked gene or to a combination of other genes.

Epistasis is the communication and the interaction of the genes. These are not within the alleles but with the genes themselves only. Also known as the genetic background, the genes are dependent on their effect to show the trait.