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(A) Trisomy is a type of aneuploidy where an individual has one extra chromosome in one of the homologous pairs,represented by the formula $(2n + 1)$.

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Trisomy

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(A) Trisomy is a type of aneuploidy where an individual has one extra chromosome in one of the homologous pairs,represented by the formula $(2n + 1)$.Monosomy refers to the loss of one chromosome $(2n - 1)$.Nullisomy refers to the loss of a pair of homologous chromosomes $(2n - 2)$.Polyploidy refers to an increase in the number of whole sets of chromosomes.

When the chromosome number of a given organism has one additional chromosome in one of the homologous pairs,the addition is known as

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