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Cell Cycle and Cell Division — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYCell Cycle and Cell Division2 Marks
Question
While examining the mitotic stage in a tissue, one finds some cells with 16 chromosomes and some with 32 chromosomes. What possible reasons could you assign to this difference in chromosome number. Do you think cells with 16 chromosomes could have arisen from cells with 32 chromosomes or vice versa?
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Answer

Cells with 16 chromosomes are produced by meiosis while that with 32 chromosomes are produced by mitosis.
  • Cells with 16 chromosomes could have arisen from cells with 32 chromosomes through meiosis.
  • Cells with 32 chromosomes could have arisen from cells with 16 chromosomes through fertilization or syngamy.

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