Ncert Exercises & Solutions

Q. 11. The human chromosome with the highest and least number of genes in them are respectively

(a) chromosome 21 and Y

(b) chromosome 1 and X

(c) chromosome 1 and Y

(d) chromosome X and Y

Ans. (c) In humans, chromosome 1 has the highest genes (2968 approx.) and the Y has the fewest (231 approx.) genes.