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If a father has o negative blood and the mother has o positive blood what will happen to the fetus?

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If the fetus is O positive, there will be no problem. If the fetus is O negative and is the first O negative baby, nothing will happen to it, but the subsequent O negative fetuses will be miscarried unless the mother takes some special injections during this pregnancy.
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Can someone have O positive blood if the mother is A negative and the father is A positive?

  Yes. If the mother has one A gene and one O gene, and the father has one A gene and one O gene, some children may inherit the O gene from both parents, and therefore b

Can a child have o positive blood if the mother is A positive and the father is A negative?

    Yes. Regarding blood type, each person has two blood group genes--one from each parent. The blood types sort like this:   For blood type O: O/O   For blood t

If fathers blood group is o positive and mothers blood group is b negative can child blood group be a negative or a positive?

Either. We know the mother is homozygous recessive rh- rh- for rh factor, so she can only pass on an rh negative allele to a child. However, if the father is heterozygous rh+