what are 3 similarities that dominant and recessive alleles have?

When an allele is dominant, the characteristic it is connected to will be expressed in an individual. When an allele is recessive, the characteristic it is connected to is less likely to be expressed. Recessive traits only manifest when both alleles are recessive in an individual.

Explanation:

we've found a lot of dominant alleles to be gain of function, whereas recessive alleles tend to be loss of function.