the sex of an individual is determined by the X and Y chromosome. the male sperm carry the XY chromosome and the female egg carry the ** chromosome. If the sperm has the X chromosome then the foetus would be female but if the sperm carries the Y chromosome then the Foetus would be male. around 6 weeks old the hormones are released and cause the foetus to develop testes and if no hormone is released then the foetus would develop ovaries. around 3 months hormones are released and the male sex organs develop if no hormones are released then the female sex organs develop.
at puberty stage the testosterone are released and the male produce sperm and hairs and in females the oestrogene is released and they develop breasts and fatty tissues around the hip.
brain lateralisation is the extent to which the left and right hemisphere of the brain take part in our activities. the right
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