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Multiple Choice
Which process occurs during embryonic development immediately after fertilization?
A
Neurulation
B
Cleavage
C
Gastrulation
D
Organogenesis
Verified step by step guidance
1
Understand that fertilization is the union of a sperm and an egg cell, resulting in a zygote.
Recognize that immediately after fertilization, the zygote undergoes a series of rapid mitotic cell divisions known as cleavage.
Cleavage results in the formation of a multicellular structure called a morula, which is a solid ball of cells.
Note that cleavage does not increase the overall size of the embryo; instead, it partitions the cytoplasm of the large fertilized egg into smaller cells called blastomeres.
After cleavage, the next stages of embryonic development include blastulation, gastrulation, and then neurulation, each with distinct processes and outcomes.