Question

# If red eye and vestigial-wing female fly are crossed toa  pure-breeding white-eyed normal winged male fly and...

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

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

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