Answer:
The mutation in the MCR1 <em>gene </em>affected the structure and function of the MCR1 <em>protein</em>.
I know i'm late but I'd go with all of them.
Accuracy means getting a result that's close to the real answer while precision means getting a similar result every time you try
If scientists played with buffalo genes a bit, they could make a new breed of beefalo that is tasty and tender, but resists cold and hot weather like the buffalo does. This is common and scientists do things like this all the time, it's how many of dog breeds were created. The cow can't stand weather that's too cold but the beefalo might which would mean more food in northern areas of the world where it's cold.