1.人类的褐色眼睛B对蓝色眼睛b为显性,今有一对褐色眼睛、正常色觉的夫妇,生了一个蓝色眼睛而色盲的儿子,那么这对夫妇的基因型是: A.BBx~Bx~b×Bbx~BY B.Bbx~Bx~b×Bbx~BY C.Bbx~Bx~b×BBx~BY D.BBx~bx~b×Bbx~BY 2.有一种植物,只有在显性基因A和B同时存在时才开紫色花,否则都开白花。已知一株开紫色花的植物和一株开白花的植物进行杂交,产生开紫花植株17棵,开白花植株15棵。问这两种亲本杂交, 1. The human brown eyes B The blue eyes b is dominant, now has a pair of brown eyes, normal color vision of the couple, gave birth to a blue-eyed and color-blind son, then the couple’s genotype is: A.BBx ~ Bx ~ b × Bbx ~ BY B.Bbx ~ Bx ~ b × Bbx ~ BY C.Bbx ~ Bx ~ b × BBx ~ BY D.BBx ~ bx ~ b × Bbx ~ BY 2. There is a plant, Sexual genes A and B only when the purple flowers open, or open white flowers. It is known that a plant with purple flowers and a white-bloomed plant hybridize to produce 17 open purple plants and 15 open white plants. Ask the two parents to cross,