can o- mother & b+ father have ab+ baby?

Answer 1

no--heather gave a great answer

Answer 2

Nope. The father and mother each donate one gene a piece for the babies blood type. Since mom is o-, her gene pair looks like this:

oo - -

To be o- she has to have both sets of o- genes as o and - are both recessive. So no matter what, she will donate an o- gene to the baby.

The father however could have a gene pair that looks like any of the following:

bo+-
bo++
bb+-
bb++

The o is always recessive to an a or b and the - is always recessive to the + so the father could be carrying an o and/or - recessive gene to pass on but still have b+ blood.

As you can see, there are absolutely no a's in any of those gene pairs. The only available combinations for of blood types of children of these two parents are:
o-, o- (o- blood type)
o-, o+ (o+ blood type)
o-, b- (b- blood type)
o-, b+ (b+ blood type)

My guess is that either mom or baby has been mistyped. Mom might be an a- or baby could just be a b+.

Answer 3

No, either the mother or the father have to have ab or a or b blood and the father has to have either ab or the opposite of the mother. (if mother has a and father has b then the blood type can be ab)

Answer 4

um no for the baby to be ab anything the mother either has to be a/b and the father has to be the opp a/b if either one is + then the baby will be + so unless mom kidnapped baby or baby got switched mom has to be a if dad is b. or the baby is just b if dad is also b but mom is o.