第一节分离定律和自由组合定律 d o self-pollination occurs as poler from the anthers falls on the stigma. male anthers male sigma seeds in o peas in pod) Austrian Monk Naturalist G, Mendel and his peas 遗传 heredity 变异 variation第一节 分离定律和自由组合定律 Austrian Monk ,Naturalist G. Mendel and His Peas 遗传heredity 变异variation