摘要:20.基因型为AABb的玉米.去雄后授以基因型为aabb的花粉.其胚乳核可能的基因型为( ) (A)AaBb.Aabb (B)AABb.AABb.Abbb (C)AAaBBb.Aaabbb (D)AAaBBb.AAaBbb.AAabbb

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