Chromosomal pairing and separation during meiosis I occurs between: Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer. a b X chromosomes and autosomes non-homologous chromosomes с homologous chromosomes d sister chromatids
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:
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Meiosis is a specialized process of cell division that occurs in the reproductive cells to form gametes. One diploid germ cell divides via meiosis to produce four haploid gametes. It is also called reductional division as the chromosome number is reduced to half in gametes as compared to the parent cells in this mode of cell division. A cell undergoes two rounds of meiotic division, namely Meiosis I and Meiosis II, and each cycle is divided into distinct phases: Prophase, Metaphase, Anaphase, Telophase., and Cytokinesis.
The gametes, sperm in males, and egg in females are responsible for reproduction by fusion. Since fusion results in the addition of the number of chromosomes present in both germ cells, it is important that the germ cells contain half the number of chromosomes present in the original organisms which is achieved via Meiosis.
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