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  4. Who reported that Downs syndrome is due to extra 21st chromosome?

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Q. Who reported that Downs syndrome is due to extra 21st chromosome?

BVP MedicalBVP Medical 2000

Solution:

Downs syndrome due to extra 21st chromosome was reported by French Physian Lejeune (1959) using microscopic techniques. The presence of 3 copies of a chromosome is called trisomy. Downs syndrome is a trisomy of autosome.