Question

Which situation allows for evolution during gene duplication? A. Existing genes are copied over generations. B. The original gene performs the same role as the mutated gene. C. The original gene NEVER duplicates. D. A mutation occurs in one copy of the original gene.

Answer 1

It would be letter D - A mutation occurs in one copy of the original gene.

Mutation is the changing of a structure of a gene that can be passed down to the next generations. It is the source of all evolution. As mutation progress through time, it leads to evolution.