Question

In the diagram what is the sex of A and B

Answer 1

Hint: In human X and Y chromosome are the sex determined chromosome, if they are present in homozygous condition then it will be female and if it have heterozygous condition then it will be male child.

Complete Answer:
- First of all both male and female form their gamete by the process of gametogenesis, after that male forms two types of gamete one is X and one is Y whereas female form both X chromosomes.
- After the process of fusion X gamete fuse with one of the X gamete of the female candidate and results in the XX type of offspring.
- The other male gamete that is Y gamete fuse with the second X gamete of the female and it will result in the XY type of offspring.
So, the A in the given figure is female and the B in the figure is male candidate as XY type of polidy is for male offspring.

Note:
- There are 23 pairs and 46 types of chromosomes in a human being which are responsible for all the characters in the human being.
- $23^{rd}$ pair of chromosome is also known as sex chromosome, as it helps in determining the sex of the human.
- When both the chromosomes are of X type then it results in the female and when one chromosome is X type and other is Y type then it results in the male.
- Females have both the same gamete of X type.