Question

Coat color in cats is determined by genes at several different loci. At one locus on the X chromosome, one allele (X ⁺) encodes black fur; another allele (X^o) encodes orange fur. Females can be black (X ⁺X ⁺), orange (X^oX^o), or a mixture of orange and black called tortoiseshell (X ⁺X^o). Males are either black (X ⁺Y) or orange (X^oY). Bill has a female tortoiseshell cat named Patches. One night Patches escapes from Bill’s house, spends the night out, and mates with a stray male. Patches later gives birth to the following kittens: one orange male, one black male, two tortoiseshell females, and one orange female. Give the genotypes of Patches, her kittens, and the stray male with which Patches mated.

Answer 1

Genotype

Patches - X+Xo

Kitten: One orange male- XoY

One Black male- X+Y

One orange female- XoXo

Two tortoise shell female - X+Xo

Stray male - XoY