The ploidy of cells characteristic of an aneuploid is best represented by which of the following?

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Aneuploidy is a condition where a cell has an abnormal number of chromosomes. This can occur due to non-disjunction during meiosis or mitosis, resulting in the loss or gain of a chromosome. The ploidy of aneuploid cells is represented by the formula 2n + 1 or 2n - 1, where n is the normal haploid number of chromosomes. Therefore, the best choice is A, which represents an extra chromosome in an otherwise diploid (2n) cell.

The Ploidy of Cells Characteristic of an Aneuploid Is Best