Question

Colorblindness is a recessive trait found on the x chromosome. Explain why all men who have an x chromosome with the recessive allele will have colorblindness while a woman can be a carrier of the trait and not express it.

Answer 1

Yes, men will express it and women won't.

Step-by-step explanation:

Men have the x-chromosome and the y-chromosome. In my own understanding, the y-chromosome is more of dormant chromosome. Due to this, every trait of recessiveness expressed on the x-chromosome is dominant in the males because the y-chromosomes do not play any part in the manifestation of sex linked traits, but in females, since they have two x-chromosomes, the body reads the trait as a recessive and not a dominant trait. In simple terms, the x-chromosomes carry the sex-linked traits, so men may have the recessive trait on their only x-chromosome which makes the trait manifest, while women may have one of their x-chromosomes with the recessive trait and the other x-chromosome, with normal trait which the body sums up as recessive.