The following pedigree shows a person affected with the sex

Last updated: 8/3/2022

The following pedigree shows a person affected with the sex chromosome aneuploidy called Klinefelter syndrome (XXY). Recall that human aneuploidy is caused by nondisjunction during meiosis. A and B are two codominant alleles of an X-linked gene; the phenotypes of individuals for this X-linked gene are shown. In which parent of the affected person did nondisjunction occur, and was the nondisjunction event in meiosis I or meiosis II? Check all that are possible. Check All That Apply Father, Melosis I Father, Meiosis II Mother, Melosis I Mother; Melosis