In a mating where the white gene is on the X chromosome and the cream gene is on an autosome, what is the expected outcome?

The mating situation described involves a white gene located on the X chromosome and a cream gene on an autosome. To analyze the expected outcome, it’s important to consider how these genes are inherited.

In this scenario, since the white gene is sex-linked, female offspring inherit one X chromosome from each parent, while males inherit their single X chromosome from their mother. This means that if the mother has the white gene allele on one of her X chromosomes, it can be passed on to both daughters and sons. Daughters will show the phenotype according to the X they inherit from their father (who contributes a Y chromosome) and one of their X chromosomes from their mother.

On the other hand, the cream gene, being on an autosome, will segregate independently of the X-linked white gene. This means that both male and female offspring will get one allele for the cream gene from each parent.

In this mating, if we assume the following genotypes:

• Mother: X^W (white) X (normal) and A (autosome with either cream or normal alleles)

• Father: Y (male with normal X) and A (same autosome distribution)

The potential results for the offspring can be outlined:

1. Females