JIPMER2018ZoologyHuman Reproduction
The correct sequence is
Options
- AZygote Cleavage Morula Blastula Gastrula
- BCleavage Zygote Morula Blastula Gastrula
- CZygote Morula Blastula Cleavage Gastrula
- 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.