Bio

How does a change in one nucleotide in one triplet code can change the nature of a protein and therefore the form of the trait ?

I believe this has something to do with mutations. I know that mutation may result from errors in DNA replication or recombination, or physical or chemical agents called mutagens.
I'm asked to use hemoglobin molecule as an example, however I'm not sure how this relates.

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asked by Jamie

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