Which stage of meiosis involves the separation of sister chromatids?   prophase II   metaphase I   anaphase I   anaphase II         Which of the following does not contribute to genetic variation in sexual life cycles?   independent assortment   random fertilization   crossing over   alternation of generations

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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: