2. In a given population of Drosophila, curly wings (c) is recessive to the wild-type condition of straight wings (c+). You isolate a population of 35 curely winged flies； 70 fies that are heterozygous for straight wings, and 45 that are homozygous for straight wings. What is the total number alleles in the gene pool? (A) 2； (B) 150； (C) 230； (D) 300； (E) None of the answers are correct.