Yellow body color is an X-linked recessive and crinkle wing is an autosomal rece

Question

Yellow body color is an X-linked recessive and crinkle wing is an autosomal recessive in Drosophila melanogaster. A cross is made between normal body color, crinkle wing females and yellow body color, normal wing males.

1. What proportion of F2 females are normal body color, normal wing? 0.75

2. what proportion of F2 males are yellow body color, crinkle wing? 0.125

3. what is the probability that an F2 fly will be a normal body color, crinkle wing male? 0.0625

I listed the answers I just want someone to explain them please!

Explanation / Answer

Let the allele for normal body color be ' Y' and for yellow body color by 'y'

Let the allele for normal wing be 'W' and for crinkle wing be 'w'

cross between normal body crinkle wings XYXYww X yellowbody normal wings Xy Y WW

F1 is normal body and normal wings heterozygote XYXy Ww and XYYWw

XYW XYw   Xy W Xy w XYW XY XYWW normal color and normal wing female    XY XYWw   normal color and normal wing female XY XyWW normal color and normal wing female    XY XyWw normal color and normal wing female    XYw XY XYWw  normal color and normal wing female XY XYww   normal color and crinkle wing female XY XyWw normal color and normal wing female    XY Xyww normal color and crinkle wing female    YW XY Y WW  normal color and normal wing male XY Y Ww   normal colrand normal wing male XyY WW    yellow and normal wing male XyY Ww    yellow and normal wing male Yw XY Y Ww    normal color and normal wing male XY Y ww  normal colr and crinkle wing male XyY Ww    yellow and normal wing male XyY ww yellow and crinkle wing male  

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