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In Drosophila, vestigial (partial formed) wings (vg) are recessive to normal long wings (vg+), and the gene for this trait is autosomal. The gene for the white eye trait is on the X chromosome. Suppose a homozygous white-eyed, long-winged female fly is crossed with a homozygous red-eyed, vestigial-winged male.
A. What will be the genotypes and phenotypes of F1?
B. What will be the genotypes and phenotypes of F2?
C. What will be the genotypes and phenotypes of a cross of F1 back to each parent?
F1 back to each parent?

wwvg+vg+ × w+/Y vgvg w+wvg+vg ♀ × w/Y vg+vg ♂

gamete gamete
wvg+ w+vg Yvg ♀ wvg, wvg+ , w+vg+, w+vg

w+wvg+vg ♀ w/Yvg+vg ♂ ♂wvg+, wvg, Yvg+, Yvg

A Color blindness is a recessive X-linked genetic disease and blood type is determine by autosomal gene. A man who had color blindness and type O blood has children with a woman who has normal color vision and type AB blood. The woman's father had color blindness.
(a) What are the genotypes of the man and woman?
(b) What proportion of their children will have color blindness and type B blood?
(c) What proportion of their children will have color blindness and type A blood?
(d) What proportion of their children will have color blindness and type AB blood?

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