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NEET2003ZoologyHuman ReproductionActual

Which one of the following statements with regard to embryonic development in humans is correct?

Options

  1. ACleavage divisions bring about considerable increase in the mass of protoplasm.
  2. BIn the second cleavage division, one of the two blastomeres usually divides a little sooner than the second.
  3. CWith more cleavage divisions, the resultant blastomeres become larger and larger.
  4. DCleavage division results in a hollow ball of cells called morula.

Correct answer

D. Cleavage division results in a hollow ball of cells called morula.

Step-by-step solution

During the embryonic development in humans, cleavage division results in a hollow ball of cells called morula. Solid mass of 32 cells formed from zygote after successive mitotic division (after 3rd division of cleavage) is called morula.

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