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NEET2005ZoologyStructural Organisation in AnimalsActual

In frog chromosome number is reduced to half

Options

  1. Awhen 2nd polar body is separated
  2. Bwhen 2nd polar body is divided
  3. Cwhen 3rd polar body is separated
  4. Dwhen 1st polar body is separated

Correct answer

D. when 1st polar body is separated

Step-by-step solution

Each primary oocyte undergo two maturation divisions, first meiotic and the second meiotic division. In the I-meiotic division, the primary oocyte divides into two unequal haploid daughter cells-a large secondary oocyte and very small first polar body. In II-maturation division, the first polar body may divide to form two second polar bodies. The secondary oocyte again divides into two unequal daughter cells, a large ootid and a very small second polar body. The ootid grows into a functional haploid ovum. The I mei

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