I think it is true that living things can be studied at different levels of organization. it probably just determines on what living things and what organization. sorry to confuse you a little but that would just be my opinion
hi there
the answer to this is
Only individuals with an aa phenotype will the express a recessive trait; therefore,the offspring must have receive one recessive allele from each parents to exhibit a recessive trait. One example of a recessive inherited trait is a smooth chin, the Domnait allele is the cliff chin
i hope this helped u out
have a great evening
FaithRawlins14