Who reported that Down's syndrome is due to extra 21st chromosome?

J.L. Down (1866)

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Lejeune (1959)

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Klinefelter (1942)

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Huntington (1872)

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Solution

The correct option is B J.L. Down (1866)
Down's syndrome was first reported by Langdon Down in 1866. It is the case of trisomy of 21st chromosome.

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Similar questions

Mark the odd one w.r.t to syndrome which occur due to failure of segregation of homologous pair of chromosomes during cell division cycle

A) klinefelter syndrome

B) down syndrome

C) turner syndrome

D) thalassemia

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