32) Normal (wild-type) Drosophila eyes are red. In a cross in Drosophila involving the X-linked recessive...

32) Normal (wild-type) Drosophila eyes are red. In a cross in Drosophila involving the X-linked recessive eye mutation white (resulting in a white eye) and the autosomal recessive eye mutation sepia (resulting in a dark eye), predict the sex and color of the eyes of the offspring from crossing true-breeding parents for parts A) and B) below. White is epistatic to the expression of sepia (i.e., if an eye is white, it cannot also be sepia; i.e., white masks the expression of sepia).

a) white females x sepia males

b) sepia females x white males

Please write out the steps clearly!

Solutions

Expert Solution

a) Predicted offspring =

White eye female ( XwXs ) & White eye male ( XwYs )

b) Predicted offspring =

White eye female ( XwXs ) & Red eye male ( XsY )

gladiator answered 1 year ago

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