Question

How is sex of a child determined? Explain with flow chart. ​

Answer 1

Answer:

• The sex of a baby is determined by the type of male gamete that fuses with the female gamete.

• All human beings have 23 pairs of chromosomes in their nuclei. Out of these 23 pairs, the last pair is known as the sex chromosome.

• The human males have 23 pairs of chromosomes including XY sex chromosomes. Therefore, the male gamete has 22 chromosomes and either an X or Y sex chromosome.

• Male gametes can be of two types: 22+X or 22+Y

• Females have 23 pairs of chromosomes including XX sex chromosomes. Therefore, their gametes can only have 22 chromosomes and one X sex chromosome.

• Type of female gametes: 22+X

Thus, as the mother provides only X chromosome, the sex of the baby is determined by the type of male gamete (X or Y) that fuses with the X chromosome of the female.

therefore, father is responsible for determination of sex of a child.