Why must male inherit colorblindness or hemophilia from their mothers?

This statement is not accurate:

- Colorblindness and Hemophilia are both X-linked recessive genetic disorders, meaning that, the mutation that causes them is located in the X-chromosome.

- Males are hemizygous for the X-chromosome, meaning they only have one copy of it, while females have two.

- Therefore, if a male inherits the mutation for these conditions, he will be affected, unlike women, who need to inherit two copies of the mutation to show symptoms (assuming an X-linked recessive inheritance pattern).

- So, males can inherit colorblindness or hemophilia from either of their parents, but the mother is the only one that can transmit an affected X chromosome to her son.

Genetic Disorders - Related Articles