Clouded leopards live in tropical rainforests of South-East Asia. The normal spots (brown with a black outline) are dominant and black spots are recessive. The trait is sex-linked. A male with black spots was crossed with a female with normal spots. She had four cubs, two males and two females. For each sex, one cub had normal spots and the other cub had black spots. Deduce the genotype of the mother. Show your work in a Punnett grid.

The genotype of the mother will be Bb.

Explanation:

A punnet square can be described as a diagram which is made to depict the outcome of a cross.

In the scenario discussed in the question, the genotype of the male parent will be bY. This is because he has the recessive black spots. As he is a male, he'll only have one allele for this gene.

In order to have one of spot design for each gender, the mother will have the genotype  Bb.

The punnet square will be as follows:

        b          Y

B   Bb         BY

b   bb         bY

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