In 95% of Cases of Down's Syndrome,there Is One Extra

question 37

Multiple Choice

In 95% of cases of Down's syndrome,there is one extra chromosome (number 21) in every cell.This aneuploid condition is most likely the result of

• A)failure to suppress DNA replication between meiosis I and meiosis II.
• B)failure of the chromosomes to assort independently during meiosis.
• C)failure of 1 homologous pair to segregate during meiosis.
• D)failure of 2 homologous pairs to segregate during meiosis.
• E)failure of the cytoplasm to divide at the end of meiosis II.

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