What is divided into four phases: G1(the period between mitosis and the initiation of nuclear DNA replication), S (the period of nuclear DNA replica-tion), G2 (the period between the completion of nuclear DNA replication and mitosis), and M (mitosis).
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:
What
is divided into four phases: G1
(the period between mitosis and the initiation of nuclear
tion), G2 (the period between the completion of nuclear
DNA replication and mitosis), and M (mitosis).
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