Explain why a small change to a gene can affect human traits? Give an example that illustrates why the change may bestow a benefit or may be harmful ?

1.Explain why a small change to a gene can affect human traits?

Explanation:

1.Genes play an important role in determining physical traits — how we look —and lots of other stuff about us. They carry information that makes you who you are and what you look like: curly or straight hair, long or short legs, even how you might smile or laugh.

I hope this helps but to be honest I am not sure how to help you with the second part of the question ; My apologise

answer; polycythemia is the correct answer;

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