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Boys and girls are similar in motor skill performance during childhood EXCEPT ... Most of the stress associated with physical activity participation is based on ... Research on the effects of sport participation on personality has shown that ... a 40-yard dash to determine how his speed compares to other players they may want ...
Answer:
1. A human body has 23 pairs of chromosomes out of which 2 pairs are sex chromosomes.
2. Male has X and Y chromosomes whereas the female has both X chromosomes.
3. The baby inherits an X chromosome from mother and X or Y chromosome for father.
4. If a baby inherits X from father then the baby will be a girl and if inherits Y then that baby will be a boy.
5. In such a way, sex of the child is determined and it is always determined by the father only.