When father is Rh positive and mother negative what type the child?

If the father is Rh positive and the mother is Rh negative, the child can be either Rh positive or Rh negative.

For a child to be Rh positive, they must inherit the Rh positive allele from both parents. Since the father is Rh positive, he must have at least one Rh positive allele. The mother is Rh negative, so she must have two Rh negative alleles. Therefore, the only way for a child to be Rh positive is if they inherit the Rh positive allele from the father.

For a child to be Rh negative, they must inherit the Rh negative allele from both parents. Since the mother is Rh negative, she must have two Rh negative alleles. The father is Rh positive, so he must have at least one Rh positive allele. Therefore, the only way for a child to be Rh negative is if they inherit the Rh negative allele from both parents.

In summary, if the father is Rh positive and the mother is Rh negative, the child can be either Rh positive or Rh negative. The probability of the child being Rh positive is 50% and the probability of the child being Rh negative is 50%.