EMBRYOLOGY
FERTILISATION EARLY DEVELOPMENT OF EMBRYO AND IMPLANTATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Fertilization
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Cleavage
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oogenesis
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spermatogensis
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Detailed explanation-1: -After fertilization, the development of a multicellular organism proceeds by a process called cleavage, a series of mitotic divisions whereby the enormous volume of egg cytoplasm is divided into numerous smaller, nucleated cells. These cleavage-stage cells are called blastomeres.
Detailed explanation-2: -Blastomere. Blastomeres are the daughter cells formed after cleavage in zygotes. During cleavage, no growth occurs in the resulting blastomeres, hence the total size and volume of the embryo remain unchanged.
Detailed explanation-3: -The correct option is B cleavage. The zygote which is formed after fertilisation is a single cell which divides mitotically to produce multiple cells (blastomeres). The mitotic divisions of the zygote are called as cleavage.