A normal woman who has a colorblind (but otherwise normal) father, marries a man

Question

A normal woman who has a colorblind (but otherwise normal) father, marries a man who has factor VII hemophilia. Their first son has Duchenne's Muscular Dystrophy.

Describe precisely what kind of events could cause each of the following in a child of theirs.

a) An normal appearing son who is heterozygous for factor VIII hemophilia and has Klinefelter's syndrome

b) A colorblind daughter with Turner syndrome.

c) A daughter with Turner syndrome and factor VIII hemophilia

d) A son with Klinefelter's syndrome who has Duchenne's muscular dystrophy

P.S. I think my teacher is looking for answers such as deletion, duplication, inversion, etc.

Explanation / Answer

a) At meiosis there is nondisjuction of X chromosome

b)  Females are XX. This happened due to the translocation of SRY (sex determining region Y) to an autosome of a 46, XX individual

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