Answer:
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
