What do we call an individual that has one dominant and one recessive allele for a trait?

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

The first generation of offspring from the cross of two parents is called the a.f1 generation b.f2 generation c.short generation d.p generation

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area