In Drosophila, the X-linked recessive mutation vermillion (v) causes bright red eyes, in contrast to the brick-red eyes caused by the wild-type allele. A separate autosomal recessive mutation, suppressor of vermillion (su-v), causes flies homozygous or hemizygous for v to have wild-type eye color. In the absence of vermillion alleles, su-v has no effect on eye color. Determine the F1 and F2 phenotypic ratios from a cross between a vermillion female with wild-type alleles at the su-v locus and a male with a wild-type allele at vermillion, but who is homozygous mutant at su-v.
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In Drosophila, the X-linked recessive mutation vermillion (v) causes bright red eyes, in contrast to...