Duplication mutations in particular are very difficult ... If direct DNA sequencing fails to identify two mutations, we will reflex the sample to targeted gene CGH array analysis for the gene ...

Gene duplication is very important for the evolution ... However, when genes are accidentally duplicated, a beneficial mutation can be created while the original gene continues to function.

For example ... That would make it look like the duplication happened in their shared ancestor, even though the two lineages converged on the same mutations of their own accord.

Biologists are uncovering thousands of examples of how mutations lead to new traits ... each can evolve in separate directions. The duplication of genes or even entire genomes is turning out ...