Question

sex-linked traits
what are the results of a cross between a female and a male with a recessive sex - linked trait?
none of the offspring will display the recessive trait
all of the offspring will display the recessive trait

Explanation:

In sex - linked traits, females have two X chromosomes (\(X^{r}X^{r}\) in this case, where \(r\) represents the recessive allele), and males have one X and one Y chromosome (\(X^{r}Y\)). When we look at the Punnett square:

• For females (\(X^{r}X^{r}\)): All female offspring will get an \(X^{r}\) from the mother and an \(X^{r}\) from the father (\(X^{r}X^{r}\)), so they display the recessive trait.
• For males (\(X^{r}Y\)): All male offspring will get an \(X^{r}\) from the mother and a \(Y\) from the father (\(X^{r}Y\)), so they also display the recessive trait.

Answer:

All of the offspring will display the recessive trait.