2. What are the possible abnormal gametes the male can produce with non-disjunction occurring in Meiosis I?
3. Could this man father a Turner syndrome (XO) child? How about a Klinefelter's syndrome child (XXY)? Explain
3. Could this man father a Turner syndrome (XO) child? How about a Klinefelter's syndrome child (XXY)? Explain
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Answer:
2. Nondisjunction only results in gametes with n+1 or n–1 chromosomes. · Nondisjunction occurring during meiosis II results in 50 percent normal gametes.
3. Although Klinefelter syndrome is a genetic condition, it is not hereditary or inherited from the parents. Instead, it is believed to occur due to a random error during the cell division of the sperm or egg cell that is responsible for giving rise to the the fetus.
Answer:
2.When nondisjunction occurs at the end of meiosis I, the possible gametes are made up of 50% n+1 gametes and 50% n-1 gametes. Meiosis in humans results in four gametes, so there would be two n+1 gametes and two n-1 gametes.