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BIO NMDCAT Chromosomes
nmdcat.online July 4, 2026

50. The numerical stability of the diploid chromosome complement across consecutive somatic generations is structurally guaranteed by

A. Random crossing over in prophase
B. Precise DNA replication followed by mitotic chromosome segregation
✓
C. The continuous activity of reverse transcriptase
D. Alternative splicing of structural histone pre-mRNAs

📝 Explanation

Somatic chromosome consistency relies on high-fidelity DNA replication during S-phase followed by symmetrical separation of sister chromatids to daughter nuclei during mitosis.

📖 Additional Information

  • Random crossing over in prophase
  • Precise DNA replication followed by mitotic chromosome segregation
  • The continuous activity of reverse transcriptase
  • Alternative splicing of structural histone pre-mRNAs

Somatic chromosome consistency relies on high-fidelity DNA replication during S-phase followed by symmetrical separation of sister chromatids to daughter nuclei during mitosis.

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