Multiple Choice
At which phase of mitosis do the sister chromatids become daughter chromosomes?
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11. Cell Division
Phases of Mitosis
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How many chromosomes are present in a human cell before mitosis begins?
A
69
B
23
C
92
D
46
Verified step by step guidance1
Understand that human cells are diploid, meaning they have two sets of chromosomes, one from each parent.
Recall that the total number of chromosomes in a typical human somatic cell is 46.
Before mitosis begins, a human cell is in the interphase stage, where the DNA has already been replicated.
Even though the DNA is replicated, the number of chromosomes remains the same at 46, but each chromosome now consists of two sister chromatids.
Therefore, the number of chromosomes present in a human cell before mitosis begins is 46.
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