How do you express sex linked genes?

Answer 1

Let's take red-green color vision as an example. You could use the letter n to represent the dominant and recessive alleles. You could use a capital letter N to represent the normal allele, which is dominant, and a lowercase letter n to represent the defective allele, which is recessive. The genotypes for the sex-linked trait would be as follows: female, homozygous dominant: XNXN; female, heterozygous: XNXn; male dominant, XNY; male recessive, XnY.

Answer 2

Sex-linked genes are typically expressed differently between males and females due to their location on the sex chromosomes. In males, sex-linked genes on the X chromosome are always expressed, while in females, the expression of these genes can be influenced by X chromosome inactivation. This means that males are more likely to show traits linked to genes on the X chromosome, while females may exhibit a mosaic pattern of expression.