Monday, 20 May 2013

3.16 understand that genes exist in alternative forms called alleles which give rise to differences in inherited characteristics

Genes (sections of DNA coding for different proteins) come in a variety of forms: for example the gene that codes for hair can come in many different colours. These different forms are different alleles, having these differences is where you vary in inherited characteristics (If there was only one allele for hair we would all have exactly the same hair.)


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