If a father's blood type is B and a mother's blood type is A, is it possible that their child could have O?

Question

i hink its yes but why?

Answer 1

Yes, it is possible if it meets the following conditions:

Mom has AO blood allele
Dad has BO Blood Allele

Then You have:

25% chance for AB blood
25% chance for AO blood
25% chance for BO blood
25% chance for OO blood

1/4 Chance to have Type O Blood.

Note: They Must Both have O Allele or It Is not Possible TO Have Type OO Blood .

Answer 2

the genes for Blood types A and B are dominant and the O gene is recessive. A person will only have the blood type of the dominant gene. So if a person carries the type A and type O gene, they will have type A blood. If they both carry the type B gene and the type O gene, they will have type B blood.
In order to have type O blood, you must carry two type O genes. If the type A parent has the A and O genes, and the type B parent has the B and O genes, then since both parents havethe O gene, it is possible for the offspring to recieve two type O genes, thus, being blood type O
I'm sorry if this is confusing, but genetics are really complicated

Answer 3

yes. okay the genotype of the father's blood type could be I^Bi and the mother's genotype could be I^Ai. the possibilities for the offspring, if you do a punnett square, are I^AI^B (type AB), I^Ai (type A), I^Bi (type B), and ii (type O). so there's a 1 in 4 chance the offspring will have type O.


just a key if you don't understand the letters:
I^B is the B allele
I^A is the A allele
i is the O allele.

I^A and I^B are both dominant, and mask the i allele. only when the child is homozygous recessive (ii) does he have an O bloodtype

Answer 4

Yes, it’s possible. With “o” represents the recessive gene. If the father has the recessive gene (Bo) and the mother has the recessive gene (Ao) it is possible to have a child that inherits the recessive gene from both parents .
The probability would be 1 in 4 probability that a child will have a blood type AB, Ao, Bo, or in your case type O

Answer 5

There are 2 possible genotypes for someone who has type B blood: BB (homozygous) and BO (heterozygous)

There are also 2 possible genotypes for someone who has type A blood: AA (homozygous) and AO (heterozygous).

A and B exert a dominant phenotype over O
A and B are codominant, meaning they exert the A and B phenotype equally.

If the Father is BO and the mother is AO, then all 4 blood phenotypes (A, B, AB and O) are possible for their children, all with equal probability.

Answer 6

There are 2 genotypes for each type A and type B.
I used 4 times of combining different genotypes.
1= IA IA x IB IB
which means, all 100% of your child will be all type AB.
2= IA i x IB i
which means, 25% of your child will has type AB, another
25% of your child will be type A, 25% for type B, and
25% will have type O.
3= IA i x IB IB
50% of your child will be type AB, 50% will have type B.
4= IA IA x IB i
50% is type AB, 50% will be type A.

= it depends on how you will use the punnet square... you need to use first the possible genotypes, unfortunately, this is multiple- allele in genetics... you have a lot of possible genotypes.

= back to your question, yes, it is possible... try to analyze the 2nd possible answer above...

Answer 7

Yes it is possible. "O" is the lack of A and B factors. Since we all have chromosomes that come in pairs, the father could be OB and the mother OA and they would test out as B and A respectively. Then if they each passed a chromatid containing "O" rather than one of the A or B factors the child would have OO and would be O.

Answer 8

I am a molecular geneticist and the answer is absolutely "yes it is possible", with a 25% possibility.

"Allison", "Zelda", "Hooshi", "segiterr..." and "NervousI" are all correct in their summations.

"jonny m" and "myrtguy" have a point for "Amber" --> "Amber", you best check with the postman (or better yet, get re-evaluated), because if you're certain that your son is of AB blood type and that you are of O blood type, then there is no possible way that your hubby (who I am assuming is the father of your son) would be of B blood type.

Answer 9

I'm a student in Molecular Genetic and Cell Biology. I tell you that it's Very very possible. Matter of fact chance of having a baby with blood type O is 25%.
This is accurate.

Answer 10

Amber -- your blood group scenario cannot be correct ... you must have type A blood unless the child is adopted or was swapped at birth. I must add that I don't think either of these are true ... you should get your blood type checked.