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  4. Failure of segregation of chromatids during cell division results in the gain or loss of chromosomes, this is called as

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Q. Failure of segregation of chromatids during cell division results in the gain or loss of chromosomes, this is called as

Principles of Inheritance and Variation

Solution:

Aneuploidy (heteroploidy) is a condition of having fewer or extra chromosomes than the normal genome number of the species. Aneuploidy commonly arises due to non disjunction of the two chromosomes of homologous pair so that one gamete comes to have an extra chromosome $(N + 1)$ while the other becomes deficient in one chromosome $(N-1)$.