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Quantity of genetic material differ in the cell

How does quantity of genetic material differ in the cell throughout the sequential phases of the cell cycle?

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The initial period of the first phase (that is, interphase) of the cell cycle is G1, followed by S and G2 and then by the mitotic phase.

In G, the ploidy (that is, the quantity of DNA molecules in the cell) can be presented by the formula 2n (that is, n is the number of DNA molecules in a gamete cell of a particular species). In S DNA duplicates and the quantity of genetic material rises from 2n to 4n. In G2 that quantity is stable: 4n. Subsequent to the mitotic phase the quantity of genetic material reduces to 2n in each daughter cell.

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