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:
Definition
Chromatin: complex of Deoxyribonucleic acid ( DNA ) and proteins in nucleus condense and from thread like structures known as chromatin.
Phase of mitosis
- Early prophase
- Late prophase ( prometaphase)
- Metaphase
- Anaphase
- Telophase ( chromatin decondenses)
1. Chromatin condenses and supercoils
Name : Early prophase of mitosis
2. The nuclear envelope is broken Kinetochote microtubules appear
Name : late prophase or prometaphase of mitosis
3. Chromosomes aligned at the celular equator,
Name : Metaphase of mitosis
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