Biology for IGCSE & O level - Inheritance (Section 8 - No. 24)
Which of the following is the most likely reason that males are more susceptible to X-linked recessive disorders?
Males only have one X chromosome.
Males have a Y chromosome that promotes the disorder.
The genes for the disorder are always dominant in males.
Males do not have the genes that prevent the expression of the disorder.
Wyjaśnienie
Males only have one X chromosome, so they will express the recessive allele on that chromosome.