AIIMS2003ZoologyHuman Reproduction
Which one of the following statements with regard to embryonic development in humans is correct?
Options
- ACleavage divisions bring about considerable increase in the mass of protoplasm.
- BIn the second cleavage division, one of the two blastomeres usually divides a little sooner than the second.
- CWith more cleavage divisions, the resultant blastomeres become larger and larger.
- 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.