the only way to tell your blood type is to have a test
No he could however be the father of the type a child
it could be.
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.
The father could be AB or B.
Yes.
If the mother is type A or AB (either positive or negative), they could be father and son. Depending on the mother's blood type, an O- father could have a child who is: A+, A-, B+, B-, O+, or O-.
If the mother has O type blood and the father has A then the child could not have AB blood type. The possible blood types for these two people children would be type A and O. Lookup a Blood Type Calculator on the net and type in the different blood types and see the results.
father blood type could be (A,B, or O) positive.
Yes, as long as the mother has a strong A blood type
yes, the mother could o negative
No, it's not possible. Someone with type A blood has the genotype AA or AO, so if both parents are type A their children could only be type A or type O. eg if the mother was genotype AA and father also AA, their children could only be AA (i.e. homozygous for blood type A), but if the mother were AO and the father AO (i.e. heterozygous), then their children could be AA, AO, or OO (i.e. blood type O). If the mother was AO but the father AA, then their children could be AO or AA but not OO. This is due to the way genetic information is passed from parent to child; male gametes (sperm) contain 23 paternal chromosomes and female gametes (egg) contain 23 maternal chromosomes, so when they fuse at conception to form the foetus (46 chromosomes as everyone has, except those with certain genetic disorders), it has 50% genetic information from the father, and 50% from the mother.
I am O positive and my husband is A negative, and our son is A negative, for some reason children mostly take their fathers blood group, but not always, other possible blood groups the baby could be would be either yours or your husbands blood type.