Chloe has the scaly skin condition icthyosis,which is X-linked recessive.Which of the following is most likely true?

Question

Quizplus · Accepted Answer

Since icthyosis is X-linked recessive, Chloe's father must have the affected allele on his X chromosome to pass it on to her. Therefore, he is either affected or a carrier. Chloe's mother must be a carrier since she does not have icthyosis herself, but her daughter does. The only choice that fits these criteria is D, in which Chloe's mother is a carrier and her father is affected.

Chloe Has the Scaly Skin Condition Icthyosis,which Is X-Linked Recessive