Why does the size of morulla …
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Posted by Sevti Mahave 6 years, 5 months ago
- 2 answers
Yogita Ingle 6 years, 5 months ago
The first priority of the zygote is to divide and make lots of new cells, so its first few days are spent in rapid mitotic division. The cell number doubles with each round of cell division, so there is an exponential increase in cell number. This division takes place so quickly that the cells do not have time to grow, so the 32 celled stage is called morula and is the same size as the zygote. At this point, the zona pellucida (a protective membrane of glycoproteins that had surrounded the egg cell) is still intact, which also limits the size of the morula.
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Nishant Sharma 6 years, 5 months ago
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