My kids have A+ Blood type & I have ARh-. What are the possible blood types my husband could be?

Question

My kids have A+ Blood type & I have ARh-. What are the possible blood types my husband could be?

Answer 1

He has to be + whatever the letters, but there is no way of knowing other than a test what your husband's ABO bloodgroup is, he really could be any of them from what you're able to tell us.

But yes- it must be rhesus + that I can tell you.

Answer 2

Your husband does have to be Rh+ because it is dominant over Rh- so your kids had to have gotten the + allele from him since you're homozygous recessive.

But, you can't determine the blood group from this information.  Your kids could be AA or Ai (with i being the recessive allele that will give type O blood in the homozygous state).

Your husband could be A and give the kids either an A or i allele.  He could be Bi and give the kids an i allele.  He could be type O (ii) and give the kids an i allele.  Or, he could be AB and give the kids an A allele.