Question

Determine whether the following scenarios are sex-linked, sex-limited or sex-influenced: "Colorblindess is more common in males than females, as males are hemizygous and will express the mutant X chromosome gene with just one copy.

Answer 1

Colorblindness is a sex-linked trait that is more common in males than females. Males only need to inherit one recessive mutant X allele to be affected, while females need to inherit the recessive allele from both parents. Female carriers may manifest mild forms of colorblindness.

Step-by-step explanation:

Colorblindness is an example of a sex-linked trait. It is more common in males than females because males only need to inherit one recessive mutant X allele to be affected, while females need to inherit the recessive allele from both parents in order to express the trait. This is because males have only one X chromosome, making them hemizygous, while females have two copies of the X chromosome. Females who are carriers of the trait may manifest mild forms of colorblindness due to the inactivation of the dominant allele located on one of the X chromosomes.