Imagine that a Toll-like receptor (TLR) gene has duplicated and mutated, creating a leucine-rich region binding pocket that can now bind to the hemagglutinin protein in the envelope of influenza virus. What do you predict will happen to this novel gene?
A. It will be selected for and over evolutionary time will become an even better receptor for HA protein.
B. It will continue to mutate, perhaps changing to bind other proteins or becoming deleted.
C. It will spread from species to species.
D. It will undergo VDJ rearrangement.
Answer: B
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