The failure of a pair of chromosomes to separate during anaphase is referred to as:

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The failure of a pair of chromosomes to separate during anaphase, resulting in one daughter cell receiving an extra chromosome and the other missing one, is referred to as nondisjunction. Inversion is a rearrangement of genetic material in which a segment of a chromosome is reversed end to end. Translocation is the exchange of genetic material between non-homologous chromosomes. Trisomy refers to the presence of an extra chromosome, resulting in three copies of a particular chromosome rather than the normal two. Disjunction, on the other hand, refers to the normal separation of sister chromatids during cell division.

The Failure of a Pair of Chromosomes to Separate During