Asked by Sam

both monosomy and trisomy result from _______ this is when the chromosomes fail to separate during meiosis

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Answered by GPT-5 mini AI
nondisjunction.

Nondisjunction is the failure of homologous chromosomes (in meiosis I) or sister chromatids (in meiosis II) to separate, producing gametes with missing or extra chromosomes that can cause monosomy or trisomy after fertilization (e.g., Turner syndrome XO, Down syndrome trisomy 21).