Zoology - Human Reproduction Question with Solution | TestHub
Zygote undergoes cleavage while moving through the isthmus of the oviduct towards the uterus and forms daughter cells called blastomeres. The embryo with 8 to 16 blastomeres is called a ____A____which continues to divide to form____B____in uterus. The blastomeres in the ____B____are arranged into an outer layer called ____C____ and an inner group of cells called the inner cell mass.
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During the development of the zygote, the zygote undergoes cleavage and finally form an 8 - 16 celled stage (morula) and then blastocyst. It moves in the uterus. Blastomeres in the blastocyst are divisible into an outer layer called trophoblast and an inner cell mass (attached to trophoblast). The trophoblast layer is attached to the endometrium and the inner cell mass, later on, gets differentiated into an embryo. Uterine cells divide rapidly and cover the blastocyst.
