( 2 pts) Nondisjunction is the phenomenon where chromosomes fail to separate (disjoin) and move to opposite poles of the cell. The result is loss or gain of a chromosome. Nondisjunction can occur in either meiosis I or meiosis II. People with the chromosome constitution 47, XXY are phenotypically male. A female with normal blood clotting whose father had hemophilia has a son with a male who has normal blood clotting. The son is XXY and has hemophilia. (a) In which parent did the nondisjunction occur? (b) In which cell division in meiosis did the nondisjunction occur?
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( 2 pts) Nondisjunction is the phenomenon where chromosomes fail to se.docx
1. ( 2 pts) Nondisjunction is the phenomenon where chromosomes fail to separate (disjoin) and
move to opposite poles of the cell. The result is loss or gain of a chromosome. Nondisjunction
can occur in either meiosis I or meiosis II. People with the chromosome constitution 47, XXY
are phenotypically male. A female with normal blood clotting whose father had hemophilia has a
son with a male who has normal blood clotting. The son is XXY and has hemophilia. (a) In
which parent did the nondisjunction occur? (b) In which cell division in meiosis did the
nondisjunction occur?
