鹦鹉羽毛颜色遗传中的自由组合 a) Phenotype and genotype Green (sky-blue (black-eyed yellow) Genotype B bi Cross sections of feathers e Yellow Melanin Melanin pigment granule pigment melanin l) Mating of heterozygotes reen) Bb Bicc(Green Phenotypic 3 blues 3 yellow I white progeny鹦鹉羽毛颜色遗传中的自由组合