Multiple choice

In a dividing cell the meiosis I is a reductional division and the meiosis II is equational division due to the

  1. pairing of homologous chromosomes

  2. crossing over

  3. separation of chromatids

  4. disjunction of homologous chromosomes

  5. nondisjunction of homologous chromosomes
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C Correct answer
Explanation

August Weismann in 1887 predicted that the number of chromosomes must be reduced by one half during gamete formation. The two divisions of meiosis are called the first and the second mieiotic divisions. In meiosis I, the number of chromosomes are reduced from diploid to haploid condition whereas in meiosis II, the two chromatids of each chromosome separate from each other and go to separate daughter cells, as a result the number of chromosomes remains the same as produced by meiosis – I.

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