How is the sex of the child formed?

Male gametes contain X and Y chromosomes, while female gametes contain only X chromosomes. The combination of sex chromosomes at the time of fertilization determines the sex of the unborn child, with the combination of XX, a girl is born, and with the combination of XY, a boy.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.