What will happen to the amount of prairie ecosystem if global warming and increased precipitation occur in that area?

If the temperature rise and the precipitation the vast grasslands called prairies will start to lose their initial appearance and characteristics and because of the higher temperature, humidity and rainfall trees will start to grow as well as bushes. Over time (depending on how quickly the change will appear) the prairie will be replaced by vast rainforests and the prairie ecosystem will be totally replaced by a tropical rainforest ecosystem similar to the southern half of central america.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.