Question

Coat color in cats is determined by genes at several different loci. At one locus on the X chromosome, the X+ allele codes for black fur, where the Xo allele encodes orange fur. Females can be black (X+X+), orange (XoXo) or tortoiseshell (a mixture of orange and black; X+Xo). Males are either black (X+Y) or orange (XoY). If a tortoiseshell female gives birth gives to one orange male, one black male, two tortoiseshell females, and one orange female, what is the genotype of the cat with which it was mated?

Answer 1

Answer:

The correct answer is : Stray male  (X°Y)

Explanation:

The given information about the combination of the alleles and their characteristics are:

X⁺ = black allele

X° = orange allele

X⁺X⁺ = black female

X⁺X° = Tortoise shell female

X° X° = Orange female

X°Y = Orange male

X⁺Y = black male

According to the question if a Tortoise shell female  gives birth gives to one orange male, one black male, two tortoiseshell females, and one orange female then :

The Tortoise shell female would be : X⁺X°  

As it is known that X allele is dominant for the colors  than by the punnete square would be give idea about all genotype, Because, male can’t have both X chromosomes to be tortoiseshell male, so the possibility is only black male (X⁺Y) or Orange male (X°Y)

Thus, the correct answer would be : Stray male  (X°Y) (by punnet square)