Question

A dominant Gene K in mice produces a kinked tail, recessive genotypes at this locus ok have normal tails. The homozygous condition at another locus AA produces a gray colour agouti; the heterozygous condition AyA produces yellow colour; the homozygous genotype AyAy is lethal.
(a) if yellow mice, heterozygous kinky tail, are crossed together, what phenotypic proportions are expected in their offspring?
(b)What proportion of the offspring is expected to be of genotype AyAKk?
(c) If all the yellow offspring were to mate at random, what would be the genotypic and phenotypic ratios among their adult progeny

Answer 1

Genotype 3:1
Phenotype 9:3:3:1