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People with Down syndrome have 47 chromosomes, including three 21^st chromosomes. What is the term to describe the aberration that occurs during meiosis that results in abnormal chromosome number?

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Non-disjunction

Independent assortment

Pairing of homologous chromosome

answer is B.

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Detailed Solution

People with Down syndrome have 47 chromosomes, including three 21^st chromosomes. The term to describe the aberration that occurs during meiosis that results in abnormal chromosome number is non-disjunction.

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