If the mother's blood group is A, that means she has a gene for A but not the gene for B. I believe that means that her genotype is either AA or AO. Since the father's blood group is O, he has neither the A gene nor the B gene, so his genotype is OO.
The child gets one gene from each parent. The gene from the father will always be O, since he is OO, while the gene from the mother could be either A or O. Therefore, the child's possible genotypes are AO and OO, meaning her blood group is either A or O.
Absolutely. A child will either have its mother's blood type or its father's blood type. If the mother's blood type is NOT O, then someone else is the father.
NO
Yes! You could produce a child with either A or B blood.
Yes, as long as the mother has a strong A blood type
Yes, the father with blood type B+ could be the biological father of a child with blood type A+. A child can inherit a different blood type from their parents due to genetic inheritance involving multiple alleles for the ABO blood group system.
The child could be A+ or O+.
Could be B or could be O.
They could be anything depending on the parental genotype.
no
To determine whether or not the alleged father could be the true father, the blood types of the child, mother, and alleged father are compared.
Must be AA, or AO because the mother having O blood, which is homozygous recessive, must be OO. The signs mean little here except the father must carry them and the child inherited them from the father.
The child's blood type could be B positive or O positive.