Science, asked by babloo13, 1 year ago

which is the first discovered and described chromosomal disorder in human beings? why is disorder developed ? which is most prominent characteristic of this disorder?

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Answered by apurva825

down syndrome is a first genetic disorder descovered...this disorder is developed because the presence of chromosome XXY...there is slow growth development in the individual and the mental ability is also like a 8-9 yrs old children when he will be of 50 yrs old

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