why isnt my baby blood type the same as mine or her fathers?

Question

I am o- and he is AB and the baby is A.
i know he is the father other wise i wouldnt be asking a dumb question

Answer 1

Blood type can differ... dont worry about it.

found this on wiki; hope it helps
http://en.wikipedia.org/wiki/Blood_type

Answer 2

There are three possible alleles (forms of the ABO blood type gene) that can be passed on from one parent to their offspring. They represent different proteins found on the outside of the blood cell.

allele A has protein "A"
allele B has protein "B"
allele O has neither protein

Allele O is recessive to both A and B (it is actually just the absence of either). A and B are co-dominant so you can have both (AB) if one parent gives A and the other gives B.

Here are the possible combinations of alleles and the blood types they result in:

Parent 1 gives A, Parent 2 gives A - child has blood type A
Parent 1 gives A, Parent 2 gives B - child has blood type AB
Parent 1 gives B, Parent 2 gives B - child has blood type B
Parent 1 gives A, Parent 2 gives O - child has blood type A ***
Parent 1 gives B, Parent 2 gives O - child has blood type B.
Parent 1 gives O, Parent 2 gives O - child has blood type O.

***So, you gave an O (which is recessive) and the father gave an A. That's how baby can be blood type A.

Daddy could have also given a B, but you could only ever give an O.

Answer 3

Blood type is determined by the antigens on the outside of the red blood cells. O blood type does not have any of these. Your partner is AB, so has has both the A and B kind of antigens on his red blood cells.

In the chromosomal dance that occurs at conception, father contributed A antigens, you contributed your O type, which is an absence of antigens. So baby has only type A antigens and therefore Type A blood. But your kid still has that O from you to possibly pass on to the next generation.

Answer 4

Parents' blood types Possible alleles combinations Possible blood types in the children
Both 'A' 'AA', 'AO' 'A' or 'O'
Both 'B' 'BB', 'BO' 'B' or 'O'
Both 'AB' 'AB' 'A', 'B' or 'AB'
Both 'O' 'OO' 'O'
One 'A' & One 'B' 'AA', 'AO', 'BB', 'BO' 'A', 'B', 'AB' or 'O'
One 'A' & One 'O' 'AA', 'AO', 'OO' 'A' or 'O'
One 'A' & One 'AB' 'AA', 'AO', 'AB' 'A', 'B' or 'AB'
One 'B' & One 'O' 'BB', 'BO','OO' 'B' or 'O'
One 'B' & One 'AB' 'BB', 'BO','AB' 'A', 'B' or 'AB'
One 'AB' & One 'O' 'AB' 'OO' 'A' or 'B'



To see a clearer picture, see the examples shown later in this article.



An alternative view is to transpose the data so that if the mother and child's blood type is known, then the father's may be presumed, as follows:



Mother' blood type: Child's blood type: Father should be type:
A A A, B, AB or O
A B B or AB
A AB B or AB
A O A, B or O
B A A or AB
B B A, B, AB or O
B AB A or AB
B O A, B or O
AB A A, B, AB or O
AB B A, B, AB or O
AB AB A, B or AB
AB O Not Usually Possible
O A A or AB
O B B or AB
O AB Not Usually Possible
O O A, B or O

So its normal ur ok:)
Please Give LT the best answer this is from a site i found and when i strolled up i saw she already posted this site so she deserves Credit:)

just thought id post whats on the site incase u didnt click it:)

Answer 5

Because blood type, like almost ALL genes are a combination of mom and dad. For blood type inheritance is simple as blood type is controlled by only two alleles, and Rh is also controlled only by two alleles.

This calculators will show you based on the blood type of the mother and father what blood types are possible. Also there is a calculator for using the mother and child's blood types to determine the potential blood types of the father:

Blood Type:
http://www.biology.arizona.edu/Human_Bio/problem_sets/blood_types/inherited.html

Rh:
http://www.biology.arizona.edu/Human_Bio/problem_sets/blood_types/rh_factor.html

Answer 6

You and her father could have a recessive blood type. In my case, it's the rh factor. Both of my parents are positive, but myself and 2 siblings are negative. We know my paternal grandmother was negative, but no clue who was negative on my mom's side (her father was an immigrant who died before her birth in an accident, so we don't know anything about his family).

Answer 7

More common then you think it has to do with if u both have a recessive geneAb then able to have both A, B, Ab and O blood types. Talk to your doctor so that he/she can give you a proper explanation.

Answer 8

Maybe he isn't really the father. My blood type of O negative, my husbands blood type is A negative, my childrens blood types are all A negative. If your childs blood type is not one or the other then baby's daddy is not baby's daddy.

Answer 9

If you two have the same blood type, then(For instance o+)
the baby will most likely have a- blood type. Someone in the family should have the same blood type as your child

Answer 10

go with LT's link. it is the best answer in my opinion since you didn't give us your blood type or the fathers this link should help you out.