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NEET2002ZoologyHuman ReproductionActual

What is true for cleavage?

Options

  1. ASize of embryo increases
  2. BSize of cells decreases
  3. CSize of cells increases
  4. DSize of embryo decreases

Correct answer

B. Size of cells decreases

Step-by-step solution

During cleavage, the zygote divides repeatedly to convert the large cytoplasmic mass into a large number of small blastomeres. It involvescell division without growth in size because cells continue to be retained within the zona pellucida. However, cell size decreases during cleavage. Related Theory Holoblastic cleavage is a complete cleavage meaning it completely penetrates the egg. Meroblastic cleavage is incomplete or partial cleavage meaning it does not penetrate the egg completely.

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