[问答题]
1.Explain how parents with 6+ a bdvyk6kf)98stwxblood type A and xqr.4i1i )wkx3zpw )g- gv y7qtpej18blood type B can have a child with bl- zkrx31v4.8x q7e)yij w)w qpgpgti1ood type O.
2.Outline how polygenic traits can show a normal distribution.
3.Explain the role of inheritance in genetic diseases.