Cell X contains 24 chromosomes. It divides by mitosis to produce cells Y and Z. How many chromosomes does cell Z contain?
Correct answer: B. 24
- A. 12
- B. 24
- C. 46
- D. 48
Explanation
Mitosis is a process of cell duplication, in which one cell divides into two genetically identical daughter cells. In the various stages of mitosis, the cell's chromosomes are copied and then distributed equally between the two new nuclei of the daughter cells. So cells Y and Z will have the same amount of chromosomes as the parent cell i.e. Cell X. So option B is correct and options A, C, and D are incorrect. Option A would be correct if cell X had undergone meiosis which divides the number of chromosomes into two. Option D would be after DNA replication but before mitosis, where the double amount of chromosomes is present temporarily.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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