In humans, the Y chromosome plays a decisive role in determining sex. If the egg is fertilized by a sperm carrying the X chromosome, a female body develops. Therefore, women have one X chromosome from their father and one X chromosome from their mother. If the egg is fertilized by a sperm carrying the Y chromosome, a male organism develops. A man (XY) receives the X chromosome only from his mother. This is due to the peculiarity of the inheritance of genes located in the sex chromosomes.
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.