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:
explain the particular kinds of tetrads observed in terms of the various types of meioses possible?
So, a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.
Humans have 23 different chromosomes, but they have two versions of each one. This means that all cells in the human body have 46 chromosomes, except for germ cells. If the sperm and egg each had 46 chromosomes, then their offspring would end up with 92 chromosomes, but this is not the case, instead, humans make their sperm and egg cells with only 23 chromosomes each, so that when they join to make a baby, it will have 46 chromosomes, the exact magic number.
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