In a test cross, peas of an unknown genotype are crossed with peas of a known genotype. in this example, smooth peas are the unknown and wrinkled peas are the known (rr). if half of the offspring from that cross are smooth and half are wrinkled, what is the genotype of the unknown plant?

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .