PHYSIOLOGY
REPRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which sequence represents the correct order of events for the formation and development of an embryo?
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meiosis > fertilization > cleavage > differentiation
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cleavage > meiosis > differentiation > fertilization
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differentiation > cleavage > meiosis > fertilization
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cleavage > fertilization > differentiation > meiosis
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Explanation:
Detailed explanation-1: -Final Answer: The correct sequence of embryonic development is: Zygote-Morula-Blastula-Gastrula-Embryo.
Detailed explanation-2: -Important events that occur during the first week of human embryonic development include gamete approximation, contact and fusion of gametes, fertilization, mitotic cleavage of the blastomere, morula formation, blastocyst formation, and implantation of the blastocyst.
Detailed explanation-3: -In amniotes, gastrulation occurs in the following sequence: (1) the embryo becomes asymmetric; (2) the primitive streak forms; (3) cells from the epiblast at the primitive streak undergo an epithelial to mesenchymal transition and ingress at the primitive streak to form the germ layers.
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