Question

In Drosophila (fruit flies), cut wings are controlled by a recessive X – linked allele
(ct), and fuzzy body is controlled by a recessive autosomal allele (fy). When a
fuzzy female is mated with a cut male, all the members of the F1 generation are
wildtype. What are the genotypic and phenotypic ratios of the F2 by sex?

Answer 1

As given cut wings are controlled by a Recessive X-linked allele. So, symbol and alleles are : Xct = cut wings = Recessive Xct+ = wild type = Dominant Another gene for fuzzy body is Recessive Autosomal allele i.e. located on X-chromosome.