从一个自然果蝇种群中选出一部分未交配过的灰色和黄色两种体色的果蝇这两种体色的果蝇数量相等每种体色的果蝇雌雄各半已知灰色和黄色这对相对性状 Template




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tomski从一个自然果蝇种群中选出一部分未交配过的灰色和黄色两种体色的果蝇这两种体色的果蝇数量相等每种体色的果蝇雌雄各半已知灰色和黄色这对相对性状 coloring