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24 April, 05:52

What process can account for the phenomenon wherein a normal XY male produces a sperm carrying two Y chromosomes?

a.) first division nondisjunction

b.) disjunction

c.) second division nondisjunction

d.) copy-number variation

e.) translocation

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Answers (1)
  1. 24 April, 06:06
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    The correct answer will be option-C

    Explanation:

    Non-disjunction is the failure of the separation of the chromosomes during the separation phase of the division that anaphase I and anaphase II of meiosis.

    The non-disjunction takes place during meiosis which takes place in the gamete formation.

    A condition which develops from the non-disjunction with one extra copy of the Y chromosome is known as 47, XYY condition or Klinefelter syndrome.

    This extra copy of the Y chromosome takes place when the chromosome separation failure takes place during anaphase II of meiosis II. This separation creates one extra copy of the chromosome.

    Thus, Option-C is the correct answer.
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