Question

Each human cell contains
a. 22 pairs of autosomes and one pair of allosome
b. One pair of autosome and 22 pair of allosomes
c. Only 23 pairs of autosomes
d. Only 23 pairs of allosomes

Answer 1

Hint The human body is made up of both autosomes and allosomes, hence the option showing only one of these can be directly eliminated. Then the left two options which are showing both autosomes and allosomes can be checked for the statement that, autosomes are more in comparison with allosomes.

Complete answer:
Humans have a total of 23 pairs of chromosomes that mean a total of 46 numbers of chromosomes in the body.
Among the 23 pairs, there are a total of 22 pairs of autosomes and 1 pair of allosomes or can be said as sex chromosomes.

The second option in the question is one pair of autosome and 22 pair of allosomes that is the exact opposite of the correct answer, there cannot be 22 pairs of sex chromosomes, and hence this option is not true.

The third option is only 23 pairs of autosomes are present, which completely wrong answer because if there will be only autosomes present, then how the sexual characteristics will develop without the sex chromosomes.
Hence this option is also wrong.

The last option is only 23 pairs of allosomes, which is also not possible, as the body is made up of both autosomes and allosomes, hence the absence of anyone will be the wrong answer.

The correct answer to this question is the first option that is (a) 22 pairs of autosomes and one pair of allosome.

Note:
- Autosomes are the chromosomes that are not the sex chromosomes, and the human has 22 pairs of autosomes in them. Allosomes are the sex chromosomes, which helps in the determination of the sex of the humans.
- Every human contains 1 pair of allosomes, where the male contains one copy of the X chromosome and other copies of the Y chromosome, whereas the female contains two copies of X chromosomes.