Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
By what mechanisms can the cells of an organism, which all contain identical genes, become differentiated into divergent cell types?
The sexually reproducing multicellular organisms start their life as a single cell called a zygote.
During embryonic development, zygote divide repeatedly to form the multicellular embryo.
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