Which of the following statements correctly defines aneuploidy?

Loss of a segment of DNA

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Loss or gain of one complete chromosome

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Change of sequence of genes on chromosome

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Deletion or insertion of singlet base pair of DNA

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Solution

The correct option is B Loss or gain of one complete chromosome
Aneuploidy is the condition of having fewer or extra chromosomes than the normal number of particular chromosome(s) present in each of the cells of an individual of the species. It can be caused due to loss of chromosome(s) or gain of chromosome(s) resulted by non-disjunction of chromosomes during cell division.

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