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

Question

Who reported that Downs syndrome is due to extra 21st chromosome? (A) J.L Down (1866) (B) Lejeune (1959) (C) Klinefeltcr (1942) (D) Huntington (1872)

Tardigrade Admin · Accepted Answer

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.

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

J.L Down (1866)

Lejeune (1959)

Klinefeltcr (1942)

Huntington (1872)

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.