We talked about the reason that two sexes are observed in most sexually reproducing organisms. a. Dr… Show more We talked about the reason that two sexes are observed in most sexually reproducing organisms. a. Draw a line on each graph below consistent with the explanation we discussed for the evolution of different gamete sizes. Explain why these relationships lead to the evolution of two sexes. b. Draw a graph showing no tradeoff between gamete size and gamete number. How would this sort of relationship influence the evolution of gamete size? • Show less