You will be mating two flies. The female fly has the following genotype on her X

Question

You will be mating two flies. The female fly has the following genotype on her X chromosomes (AB, ab). The male fly has the following genotype on his X chromosome (AB). One gene (A) codes for eye color. The dominant allele codes for red and the recessive codes for white. The other gene (B) codes for wing color. The dominant allele codes for black and the recessive allele codes for gray. What are the phenotypes of the parents? What are the genotypes and phenotypes of the possible offspring? Be sure to account for possible recombination events.

Explanation / Answer

The female parent genotype is AaBb and the male parent genotype is ABY as Y stands for Y chromosome of male with no coding genes. So the female phenotype is red eye colour and black wing colour and the male is also having same phenotype.

The genotype of progeny can be ABAB , AaBb , ABY abY.

The phenotype will be 75% chances are of red eye and black wing colour and 25% chances of white eye and gray wing colour.

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