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23-08-2022
Biology

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What would you expect to be the chromosomal 21 complement in the secondary oocyte? what consequences are likely in the resulting zygote, if the secondary oocyte was fertilized?

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Tutorconsortium352 Tutorconsortium352

25-08-2022

The chromosomal 21 would complement in the secondary oocyte because Chromosome 21 would be completely absent during mitosis.

What is mitosis?

Mitosis is a stage of the cell cycle during which replicated chromosomes are split into two new nuclei.
Mitosis results in the formation of genetically identical cells with the same number of chromosomes. As a result, mitosis is often referred to as equational division.
Mitosis is generally preceded by S phase of interphase (during which DNA replication occurs) and is frequently followed by telophase and cytokinesis, which separates the cytoplasm, organelles, and cell membrane of one cell into two new cells with nearly equal shares of these cellular components.
The mitotic (M) phase of an animal cell cycle is defined by the several stages of mitosis—the division of the mother cell into two genetically identical daughter cells.

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