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Question

Morula formed at the end of cleavage is .......... celled.

A
14
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B
16
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C
18
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D
20
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Solution

The correct option is B 16
At about 30 to 36 hours of fertilisation, the zygote moves through the isthmus of oviduct to uterus and divides mitotically by a process called cleavage which results into two smaller cells called blastomeres. A second cleavage occurs which results in the formation of 4 cells. Cleavage continues to occur and results in a solid ball of cells i.e. morula having 16 cells
So, the correct answer is '16'

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