In fruit flies (drosphilia), one eye color gene is x-linked, with a recessive white allele and a dominant red allele. if white eye female flies were bred to red eyed male flies, what would be the expected offspring (assume all parent toll flies are purebred)

XR          Y

XrXRXrXrY

Explanation:

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r: recessive white allele

R: dominant red allele

XX: female

XY: male

XrXr: white-eyed female. A possible gamete Xr  (

assuming a homozygous female)

XRY: red-eyed male. Possible XR and Y alleles.

50% of the offspring will be heterozygous female with red-eye phenotype (dominant)

50% of the offspring will be male with white eyes phenotype (recessive).

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