• Question: What are we made out of and why?

    Asked by Ellz to Steph on 20 Mar 2015.
    • Photo: Stephanie Dyson

      Stephanie Dyson answered on 20 Mar 2015:

      A human being is made out of 100’000 billion cells… Each one has a nucleus, in which there are 23 pairs of chromosomes; one of the chromosomes comes from our mother, and the other from our father. A chromosome is made out of a long twisted thread of DNA (the double helix). DNA is a succession of 4 different nucleotides, known as A, T, G and C. There are 3 billion nucleotides spread over 23 chromosomes! This is what is called our genome, i.e. our biological identity and the genetic heritage we pass onto our children.

      I hope that helps 🙂

      Steph

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