Question

what is the principle of dominance?
the idea that some alleles are dominant and some are recessive
the idea that recessive traits will always reappear in a population
the idea that offspring inherit one allele from each parent

Explanation:

The principle of dominance, proposed by Mendel, states that some alleles (dominant) mask the expression of others (recessive) when present together in an organism.

Answer:

the idea that some alleles are dominant and some are recessive