Question

which of the following statements are true regarding a recessive trait that is carried on the x chromosome?
correct answer(s)
males can express the trait.
females can express the trait.
females are more likely to express the trait.
males are more likely to express the trait.
both sexes are equally likely to express the trait.
incorrect answer(s)

Explanation:

• Males have one X chromosome. If it carries the recessive allele, they will express the trait (e.g., color - blindness in humans).
• Females have two X chromosomes. They need two recessive alleles (one from each parent) to express the trait. Since males only need one recessive allele (on their single X) and females need two, males are more likely to express X - linked recessive traits.

Answer:

Males can express the trait.
Females can express the trait.
Males are more likely to express the trait.