Biology

1A man of blood group AB marries a woman of group AB. The probability of a child with group A is

2Two parents with sickle-cell trait (AS × AS) have a child. The chance it has sickle-cell disease (SS) is

3A child of parents with blood groups AO and BO could have blood group

4A person of blood group O can receive blood from

5The universal recipient blood group is

6A father with blood group A (genotype AO) and a mother with group B (BO) can have children with blood groups

7In the ABO blood group system, alleles A and B are

8A person with blood group AB can receive blood from

9A woman who is a carrier of haemophilia marries a normal man. The probability that a son will be haemophiliac is

10A colour-blind man marries a carrier woman. The probability that a son is colour-blind is