Multiple Choice
In the human body, which cell-division process occurs more frequently over a lifetime, and why?
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16. Cell Division
Mitosis
Multiple Choice
All of the following refer to mitosis, except:
A
Reduction of chromosome number from diploid to haploid by homologous chromosome pairing and crossing over
B
Occurs after DNA replication during the M phase of the cell cycle
C
Separation of sister chromatids into two daughter nuclei
D
Formation of two genetically identical nuclei from one parent nucleus
Verified step by step guidance1
Step 1: Understand the context of mitosis. Mitosis is a process of cell division that results in two genetically identical daughter cells, each with the same chromosome number as the parent cell.
Step 2: Review the key features of mitosis: it occurs after DNA replication during the M phase, involves the separation of sister chromatids, and results in two genetically identical nuclei.
Step 3: Identify the statement that does not describe mitosis. The statement about reduction of chromosome number from diploid to haploid by homologous chromosome pairing and crossing over describes meiosis, not mitosis.
Step 4: Recall that meiosis includes homologous chromosome pairing and crossing over, which are absent in mitosis, and that meiosis reduces chromosome number to produce haploid cells.
Step 5: Conclude that the exception in the list is the process involving reduction of chromosome number and homologous recombination, which is characteristic of meiosis, not mitosis.
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