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In Drosophila, the eye color gene is on the X chromosome. The red eyes allele (W) is dominant over the white eyes allele (w). If a red-eyed homozygous female is crossed with a white-eyed male, what is the genotypic ratio of the F2 generation?

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Oseni

Answer:

XWXw, XWXw, XWY, XWY

Explanation:

Since this is a X linked allele, homozygous red eyed female will be [tex]X^{W}X^{W}[/tex] and white eyed male will be [tex]X^{w}Y[/tex].

The offsprings will be [tex]X^{W}X^{w}[/tex], [tex]X^{W}X^{w}[/tex], [tex]X^{W}Y[/tex], [tex]X^{W}Y[/tex].

See the attached image for the Punnet's square analysis

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