Which event is least likely to occur after a gene duplication event?
A) One gene retains its function,while the other becomes a pseudogene.
B) Both genes retain their function,but they are expressed in different tissues.
C) Both genes retain their function,but they are expressed at different times.
D) Both genes become pseudogenes.
E) One gene retains its function,while the other evolves to have a new function.

Question

Quizplus · Accepted Answer

While gene duplication events can lead to various outcomes, the least likely event is for both duplicated genes to become pseudogenes. This would essentially eliminate the duplicated gene and its function, which is often not a favorable outcome in terms of evolutionary success. The other outcomes listed (A, B, C, and E) are all relatively common and have been observed in various species.

Which Event Is Least Likely to Occur After a Gene