Question

Which of the following determines the sex of a child?

Options

• The length of the mother’s pregnancy

• The length of time between ovulation and copulation

• The presence of an X chromosome in an ovum

• The presence of a Y chromosome in a sperm

Answer 1

The presence of a Y chromosome in a sperm

Explanation: 

The male sex chromosome is the deciding factor for the gender of the child. If the X part fertilizes with the ovum, the girl is born. If Y fertilizes, then a boy is born.