Aneuploidy is caused by .............. of the zygotic chromosome number

Thrice of gametic number

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Twice of gametic number

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Quadruple of gametic number

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Abnormality

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Solution

The correct option is D Abnormality
Aneuploidy is defined as any deviation from the normal number of chromosomes, usually meaning a cell nucleus possessing too many or too few chromosomes. Monosomy and trisomy conditions result from the subtraction or addition of chromosomal material, respectively.

So, the correct answer is 'Abnormal'.

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