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How come boys are different from girls?

How come boys are different from girls?
Carrieann Ballard from Cumbria (Aged 5-14)

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One Response

  1. We all inherit DNA in the form of chromosomes from our parents. One of these chromosomes comes in two forms, X and Y. Generally speaking, girls have two X chromosomes, whilst boys have one X and one Y chromosome. Mothers therefore must pass an X chromosome onto their children, whilst fathers can pass either an X or Y chromosome, to create a daughter or son respectively. But why does a Y chromosome make you male? The Y chromosome contains a gene that acts as the master switch to turn on a cascade of events that lead to the development of all the things that we associate with being male. For examples, males and females have varying levels of different chemical signals, called hormones, and these can control a whole range of characteristics from physical appearance and body strength to mental abilities and character. Many people also believe that environment makes boys different from girls, i.e. that the way parents and society treats boys and girls is different, so they end up being different.

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