The genotype of an individual with Down's syn | vedclass

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(A) Down's syndrome is a chromosomal disorder caused by the presence of an additional copy of chromosome number $21$ (trisomy of $21$).This condition

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$45 + XX$

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(A) Down's syndrome is a chromosomal disorder caused by the presence of an additional copy of chromosome number $21$ (trisomy of $21$).This condition results in a total of $47$ chromosomes instead of the normal $46$.For a female with Down's syndrome,the genotype is $45 + XX$,and for a male,it is $45 + XY$.Among the given options,$45 + XX$ represents the genotype of a female with Down's syndrome.

The genotype of an individual with Down's syndrome is:

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