In fruit flies, one genotype for red eyes is written XRXR. The R stands for the dominant allele for red eyes. What does the X stand for? the recessive allele for white eyes the female chromosome the codominant allele for pink eyes the male chromosome

Question

Biology

Chase Church

5 March, 06:57

In fruit flies, one genotype for red eyes is written XRXR. The R stands for the dominant allele for red eyes. What does the X stand for? the recessive allele for white eyes the female chromosome the codominant allele for pink eyes the male chromosome

+3

Answers (1)

Know the Answer?

Izabella Lee · Answer 1

The correct answer is : the female chromosome

Explanation:

According to the question, it is mentioned that R is a dominant allele, responsible for the red eyes. RR is a genotype for Red eyes. A fruitfly has a diploid genotype which means each trait is represented by a pair of chromosomes. In the above question, the dominant red eye colour trait is represented by the pair of chromosomes RR. Therefore, XX must represent another trait. By convention, a pair of X chromosomes (XX) represent a female and a combination of X and Y chromosomes (XY) represents a male. Given XX genotype represent a female fruitfly chromosome.