In: Biology
A boy with Klinefelter syndrome (47 chromosomes, XXY) is born to a mother who is phenotypically normal and a father who has the X-linked skin condition called anhidrotic ectodermal dysplasia (AED). The mother's skin is completely normal with no signs of the skin abnormality. By contrast, her son has patches of normal skin and patches of abnormal skin.
a) What are the genotypes of the mother and the father?
(b) What is the genotype of the son?
(c) Which parent contributed the abnormal gamete? Briefly explain how you determined the parent.
(d) What phenomenon occurred during meiosis to produce this abnormal gamete, and at which division of meiosis (1st or 2nd) did it occur? Briefly explain how you determined which division was affected.