Question

If red eye and vestigial-wing female fly are crossed toa  pure-breeding white-eyed normal winged male fly and generate F1 progeny. and those F1 males and females are crossed, what proportion of the F2 progeny will be red-eyed and female, with vestigial wings in fractional form

vesgital is reccesive, it autosomal and white eyes is reccesive to red

Answer 1

Red Eyed Vestigial winged female fly = ww + XX

White eyed normal winged male fly = WW + xY

Cross ------------> ww + XX x WW + xY

Gametes -------------> w+ X W + x W + Y

F1 -------------------------> Ww + Xx Ww + XY

(Red Eyed, Normal winged female) (White eyed Normal winged male)

Ww + Xx x Ww + XY

Gametes ------------> W+ X W+x w+X w+x W+X W+Y w+X w+Y

	W+X	W+x	w+X	w+x
W+X	WW+XX	WW+Xx	Ww+XX	Ww+Xx
W+Y	WW+XY	WW+xY	WW+XY	Ww+xY
w+X	Ww+XX	Ww+Xx	ww+XX (Red eyed vestigial winged female)	ww+Xx (Red eyed vestigial winged)
w+Y	Ww+XY	Ww+xY	ww+XY	ww+xY

Proportion of Red eyed vestigial winged female = 2/16 = 1/8 = 0.125