Multiple Choice
In a typical human somatic cell, mitosis produces two daughter cells. How many chromosomes does each daughter cell have after mitosis (assuming no errors)?
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16. Cell Division
Mitosis
Multiple Choice
In a typical human somatic cell, how many chromosomes are present at the start of mitosis (prophase), after DNA replication has occurred?
A
92 chromosomes (each consisting of one chromatid)
B
23 chromosomes (each consisting of two sister chromatids)
C
46 chromosomes (each consisting of one chromatid)
D
46 chromosomes (each consisting of two sister chromatids)
Verified step by step guidance1
Recall that a typical human somatic cell is diploid, containing 46 chromosomes in total before DNA replication.
Understand that DNA replication occurs during the S phase of interphase, resulting in each chromosome consisting of two identical sister chromatids.
Recognize that although the number of chromatids doubles after replication, the number of chromosomes remains the same because sister chromatids are joined at the centromere and counted as one chromosome.
At the start of mitosis (prophase), the cell has 46 chromosomes, each made up of two sister chromatids.
Therefore, the correct description is 46 chromosomes, each consisting of two sister chromatids.
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