[问答题]
1.Explain how parents d; 2b;gkvz5fpf8 7jzcwith bloalo3 +by/o7d36lmkof4js nk:od type A and blood type B can have a child with blood type O lk67lk 4o 3y/obdnj m3o+:fas.
2.Outline how polygenic traits can show a normal distribution.
3.Explain the role of inheritance in genetic diseases.