Multiple Choice
In which mitotic phase do the chromosomes condense and the mitotic spindle begin to form?
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3. Energy & Cell Processes
Phases of Mitosis
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During prophase of mitosis, how many replicated chromosomes are present in the original cell?
A
46 replicated chromosomes
B
92 replicated chromosomes
C
23 replicated chromosomes
D
69 replicated chromosomes
Verified step by step guidance1
Understand that mitosis is a process of cell division that results in two genetically identical daughter cells from a single parent cell.
Recall that human cells typically have 46 chromosomes, which are organized into 23 pairs.
During prophase, the chromosomes have already been replicated during the S phase of the cell cycle, resulting in each chromosome consisting of two sister chromatids.
Since each of the 46 chromosomes is replicated, there are still 46 chromosomes present, but each is made up of two sister chromatids.
Therefore, during prophase, the original cell contains 46 replicated chromosomes, each consisting of two sister chromatids.
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