Q17 / 180 · JIPMER 2015 · Botany

The non-disjunction, in meiosis may result is extra copy of a chromosome in a sperm cell. During which phase the above phenomenon may occur?

  • A
    Prophase-l, prophase-II
  • B
    Metaphase-I, anaphse-II
  • Correct answer
    C
    Anaphase-I, anaphase-II
  • D
    Anaphase-I, telophase-II

Solution

In anaphase-I and II chromosomes become shorter and thicker and migrate towards opposite poles of the cell. In case of non-disjunction of chromosomes an extra copy of a chromosome will be present in the cell.

Hence, the correct answer is option: 'C'.

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