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NEET2018ZoologyHuman ReproductionActual

The correct sequence is

Options

  1. AZygote Cleavage Morula Blastula Gastrula
  2. BCleavage Zygote Morula Blastula Gastrula
  3. CZygote Morula Blastula Cleavage Gastrula
  4. DZygote Blastula Morula Cleavage Gastrula

Correct answer

A. Zygote Cleavage Morula Blastula Gastrula

Step-by-step solution

The correct sequence is Zygote Cleavage Morula Blastula Gastrula. At about 30-36 hrs after fertilisation, the zygote divides into smaller cells by a process called cleavage. It is division of cells. It results in a solid ball of cells, called morula. It is a 16 -celled stage. It forms blastula which is a 64 -celled stage. It contains a fluid-filled cavity called blastocoel. It ultimately leads to gastrula stage. It is a multilayered structure which is followed by organogenesis.

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