In Drosophila,an individual female fly was observed to be of the XXY chromosome complement normal autosomal complement and to have white eyes as contrasted with the normal red eye color of wild type.
-The female's father had red eyes,and the mother had white eyes.Knowing that white eyes are X- linked and recessive,present an explanation for the genetic and chromosomal constitution of the XXY,white- eyed individual.

Question

Quizplus · Accepted Answer

The XXY chromosome complement in the female fly indicates a nondisjunction event, where chromosomes failed to separate properly during cell division. Since the white eye trait is X-linked and recessive, and the mother has white eyes while the father has red eyes, the nondisjunction must have occurred in the mother. This could have happened in either meiosis I or meiosis II, allowing for the transmission of both X chromosomes (one carrying the white eye allele) to the offspring.

In Drosophila,an Individual Female Fly Was Observed to Be of the XXY