Yes it is ok now you know
The answer is it's combination of alleles for a specific one.
The answer would be:
its shape
its action
Pronator means that the muscle will be doing pronation movement. The pronation movement could happen in the hands and feet.
The word teres saying that its shape is round. The name doesn't contain a hint about the number(like bi-ceps or tri-ceps) or the location(like palmar or plantar).
Your able to see things u cant with the naked eye.