The study of the early development of an organism and is quite often used to show similarites and differences

One gene can influence trait(s). one trait can be determined by gene(s).

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Why has two different alleles for the same trait?