Question

Which of the following correctly represents the number of autosomes and allosomes in human beings?

• A. (21+2) pairs
• B. (22+1) pairs
• C. (19+4) pairs
• D. (2+21) pairs

Answer 1

The correct option is B

(22+1) pairs

Humans contain 22 pairs of autosomal chromosomes and one pair of allosomes (sex chromosomes). The autosomal pairs are usually represented with numbers, while the sex chromosomes with letters. Females contain two X chromosomes and are represented as 44+XX. Males on the other hand, have both an X and a Y chromosome, and are represented as 44+XY.