Question

The number of pair(s) of sex chromosomes in the zygote of humans is

• A. One
• B. Two
• C. Three
• D. Four

Answer 1

The correct option is A

One

The correct option is A.

Explanation of the correct option:

1. In humans, there are 46 chromosomes and 23 pairs of chromosomes.
2. Out of this, 2 of them (1 pair) are sex chromosomes.
3. There are two types of sex chromosomes, X and Y.
4. Males have 22 pairs of autosomes and one pair of sex chromosomes, so represented as 44 + XY.
5. Females have 22 pairs of autosomes and one pair of sex chromosomes, so represented as 44 + XX.
6. The combination of sex chromosomes (XY or XX) determines the sex of the individual.
7. The zygote formed have a pair of sex chromosome (XX or XY).

Final answer: The number of pair(s) of sex chromosomes in the zygote of humans is one.