Cleavage in the fertilized egg of humans

Starts in uterus

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Is meroblastic

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Starts when egg is in fallopian tube

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Is discoidal

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Solution

The correct option is C Starts when egg is in fallopian tube
In humans after fertilization, zygote undergo mitotic divisions (called cleavage) and moves through the isthmus of the oviduct towards the uterus by forming 2, 4, 8, 16 daughter cells, called as blastomeres. The embryo with 8 to 16 blastomeres is called as a morula. Thus, the correct answer is option C.

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