1. During mitosis, a single cell divides to produce two daughter cells. What must happen in the original cell so that each of the daughter cells has a complete set of chromosomes?

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Answer:

The cell copies each of it chromosomes, then carefully separating each of them to ensure the new cells have a full set.

Explanation:

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DNA replication must happen in the original cell so that each of the daughter cells has a complete set of chromosomes.

MITOSIS:

  • Mitosis is a type of cell division in which a single cell produces two daughter cells that have same number of chromosomes as the parent cell.

  • In mitotic division, the daughter cells are genetically identical to the parent cell.

  • Prior to the cellular division process, the genetic material (DNA) of the parent cell must first be replicated i.e. synthesis of two identical copies of DNA.

  • The DNA replication is to ensure that each daughter cell that results from the mitotic division posseses the same type and amount of chromosomes (DNA).

  • Therefore, DNA replication must happen in the original cell so that each of the daughter cells has a complete set of chromosomes.

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