36. Which of the following statements explains how a red-eyed male can result fr

Question

36. Which of the following statements explains how a red-eyed male can result from a cross between a true-breeding white-eyed female and a red-eyed male? A mutation has arisen on the female white-eye allele that transforms it into a red-eye allele. The male parent provides them with a red-eye allele on the Y. The female parent provides them with a white-eye allele on the X, and the male parent provides them with a red-eye allele on the Y The male parent provides them with a red-eye allele on the X, and the female parent allele has been lost. None of the answer options is correct. A) B) C) D) E)

Explanation / Answer

STATEMENT 3 best explains this cross.

here female parent phenotype is white eyed. so female parent must be homozygous recessive because it has recessive white eyed phenotype and in this case male parent could be hemizygous red eyed.
so the gene responsible for red eyes is must be present on the Y chromosome. red eyed male progeny is only possible when male parents is hemizygous red eyed and female parents is homozygous white eyed.

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