Suppose that you examine a vial of 100 flies that are all offspring from a single genetic cross, and you find only red-eyed females and red-eyed males present. You allow these flies to interbreed, and in the next generation you find all the females are red-eyed, but you find both red-eyed and white-eyed males. The allele for red eye colour (Xw+) is dominant over the allele for white eye colour (Xw) . Which of the following best describes the genotypes of the original parents?
A) Xw+Xw+; XwY
B) Xw+Xw; Xw+Y
C) Xw+Xw; XwY
D) XwXw; Xw+Y
Correct Answer:
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