CBSE
Gujarat Board
Haryana Board
Class 10
Class 12
Why is adolescence called teens?
Adolescence is called teens because it covers 13 to 18 or 19 years of age.
Who is responsible for sex determination of a child, mother or father?
The sex chromosomes of father determines the sex of the baby.
What type of chromosomes occur in sperms?
Sperms has either X chromosome or Y chromosome.
What are the names given to sex chromosomes?
X and Y.
What is the legal age for marriage for girls and boys?
Legal age for marriage is 18 years for girls and 21 years for boys.