Human chromosome number was determined correctly by

Options

(a) Landsteiner
(b) Moorehead
(c) Tijo and Levan
(d) J.L. Hamerton

Correct Answer:

Tijo and Levan

Explanation:

Tijo and Levan in the year 1956 determined the human chromosome number correctly. In human beings there are 23 pairs of chromosomes of which 22 pairs are autosomes and 1 pair is of sex-chromosomes. The autosomes are homologous while the sex-chromosomes are same in females (XX) but different in males (XY). Sex-chromosomes are also called heterosomes or allosomes.