How does a cell know which genes to express.

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.

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 .

Can a trait be both polygenic and have multiple alleles? explain why or why not.