Why are most X-linked disorders recessive?
A) X-linked dominant disorders are always fatal to females
B) females only have one active X- dominant disorders would render them sterile
C) dominant X-linked disorders are almost always fatal to the male embryo
D) dominant X-linked disorders, regardless of their overall effect, prevent proper sperm formation
E) more than one of these is the reason why most X-linked disorders are fatal

Question

Quizplus · Accepted Answer

X-linked dominant disorders can be more severe in males because they have only one X chromosome, and if the disorder is severe, it can lead to lethality in male embryos. This is why most X-linked disorders are recessive, as they allow males to survive with one normal allele.

Why Are Most X-Linked Disorders Recessive