Jan ingests a drug that causes her to tremble and twitch. which neurotransmitters may have been affected?

The neurotransmitter that may have been affected is the dopamine as this is the one responsible for the motor control in regards of the individual’s voluntary movements and that causes Jan to engage of trembling and twitching because her dopamine has been affected.

idk lol use google m8

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.