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Name the term which defines the presence or absence of extra copies of a few chromosomes.

(a) Extranuclear inheritance

(b) Aneuploidy

(c) Euploidy

(d) Diploid

I got this question during an internship interview.

The doubt is from Cytogenetics in portion Genetics of Life Sciences

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Right choice is (b) Aneuploidy

Explanation: Ploidy is defined as the numerical changes in chromosome numbers. It is basically of two types, euploidy involve a complete set of a chromosome, while aneuploidy refers to the presence and absence of a few copies of chromosomes but not a whole set.

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