• Question: Why Is The Human's Body Has So Much Diffirent Types

    Asked by kg42 to Adam, Catherine, Karen, Leila, Nazim on 14 Mar 2012.
    • Photo: Catherine Rix

      Catherine Rix answered on 14 Mar 2012:

      Most humans have a lot of things in common, like we have the same body parts and organs, although there are differences, for example sometimes people are born with only one kidney. Differences between the way our bodies look can be due to genetics – what we have inherited from our parents, like eye colour for example, and also due to environmental factors such as diet or exposure to certain chemicals. Your genetic material (that DNA inside your cells which contains the instructions to ‘build’ you) comes from a mixture of your mum’s DNA and your Dad’s DNA. This combination of DNA means that we are all unique, unless you are an identical twin in which case your DNA is pretty much the same as one other person! The human body is an amazing thing!

    • Photo: Adam Stevens

      Adam Stevens answered on 14 Mar 2012:

      The variations between humans is much less than the variation between us and other living things! The differences are only in small things like eye colour or height, which is all down to the slight variation in our DNA telling our cells to grow in particular ways.

      There’s a bit more variation when DNA goes wrong, but most of the time the different is still very small compared to say the difference between us and a pot plant!

    • Photo: Leila Battison

      Leila Battison answered on 19 Mar 2012:

      There’s variation all over nature, and its all because we have sex!
      Reproducing sexually means that creatures get to mix up their genes every generation, so no children will have exactly the same genes as their parents, and no to living things look the same. If you add up these little differences over thousands of years you can get very different races that look different, but are all related closely to eachother.

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