Imagine that long fins in zebrafish is a dominant trait. a breeder wants to set up a breeding program beginning with homozygous dominant long-finned fish. if she obtains a handful of the long-finned fish, how can she tell which if any of these are homozygous for the trait? a. cross the long-finned fish with short-finned fish; if three-fourths of the offspring are long-finned and one-fourth are short-finned, the long-finned parent is homozygous. b. cross the long-finned fish with short-finned fish; if half the offspring are long-finned and half are short-finned, the long-finned parent is homozygous. c. cross the long-finned fish with short-finned fish; if four-fifths of the offspring are long-finned and one-fifth are short-finned, the long-finned parent is homozygous. d. cross the long-finned fish with short-finned fish; if the offspring are all long-finned, the long-finned parent is homozygous.