Can an A positive Mom and O positive Dad produce an O negative child?

Question

Can an A positive Mom and O positive Dad produce an O negative child?

Answer 1

Yes it is possible...

Answer 2

my mom A+ Dad is O+ like one said above the differances my mom somehow had all 4

A+ = me

A- = younger sister

O+ = younger brother

O- = older brother

im A+ husband O+

A- = twins

A+ = daughter

Answer 3

The child of A+ and O+ parents will be either:

A+

A-

O+

O-

So to answer your question, YES. Anyone who is telling you "No" doesn't understand human biology and genetics.

Answer 4

If i am not mistaking, i really think that is close to impossible.

Answer 5

no!get a dna test

Answer 6

I'm just going by what a doctor told me, he said that you get your blood type from your dad, that was true at least in my case, my mom and dad are both A+, my half sister (different dad) is A-. So in that logical the baby would be O positive. I would just ask your doctor, but that was what was told to me.

Answer 7

if you mean positive as in all dominant genes. no. its not possible, the only way it would be possible is if the mom had heterozygous genes. as in a dominant and recessive. [ A i ]

and the dad [ i i ], in that case it is possible.

Answer 8

Yes.  If you are questioning paternity, use a DNA test. Do not rely on blood typing because it does not follow strict mendelian genetics.

Answer 9

Yes, but the genes that control the negative Rh factor are recessive. Both parents would have to be heterozygotes (have one negative and more positive gene) and then it is a 25% chance.

As far as blood type, if Mom is heterozygous (AO) then yes, and the chances are 50%, because Dad is OO.

Answer 10

Wouldn't two positives make a positive?

My mom is - and my dad is +...I'm -

I'm not totally sure.

Answer 11

Nope.  Chances are taht the baby will be either A or O +

Answer 12

yes...totally possible.....speak to a genetic counseler to find out more about stuff like this.

Answer 13

yes - chances are 1 in 16

Mom could carry an O gene and also an Rh- gene

Dad could carry an RH- gene

Answer 14

If the father is + and the mother is + then the baby will be +

About blood types:  

  

Every person has a blood type, (O, A, B, or AB) and an Rh factor, either positive or negative. The blood type and the Rh factor simply mean that a person's blood has certain specific characteristics. The blood type is found as proteins on red blood cells and in body fluids. The Rh factor is a protein that is found on the covering of the red blood cells. If the Rh factor protein is present on the cells, the person is Rh positive. If there is no Rh factor protein, the person is Rh negative. The following are the possible combinations of blood types with the Rh factors:  

  

Blood Type  A  B  O  AB  

Rh positive  A+  B+  O+  AB+  

Rh negative  A-  B-  O-  AB-  



  

Rh factors are genetically determined. A baby may have the blood type and Rh factor of either parent, or a combination of both parents. Rh factors follow a common pattern of genetic inheritance. The Rh positive gene is dominant (stronger) and even when paired with an Rh negative gene, the positive gene takes over.

If a person has the genes + +, the Rh factor in the blood will be positive.

If a person has the genes + -, the Rh factor will also be positive.

If a person has the genes - -, the Rh factor will be negative.

A baby receives one gene from the father and one from the mother. More specifically, consider the following:

If a father's Rh factor genes are + +, and the mother's are + +, the baby will have one + from the father and one + gene from the mother. The baby will be + + Rh positive.

If a father's Rh factor genes are + +, and the mother's are - -, the baby will have one + from the father and one - gene from the mother. The baby will be + - Rh positive.

If the father's genes are - -, and the mother's are - -, the baby will be - - Rh negative.



  



If the father's genes are + - Rh positive, and the mother's are + - Rh positive, the baby can be:

+ + Rh positive

+ - Rh positive

- - Rh negative



  



If the father's genes are + -, and the mother's are - -, the baby can be

- - Rh negative

+ - Rh positive



Problems with the Rh factor occur when the mother's Rh factor is negative and the baby's is positive. Sometimes, an incompatibility may occur when the mother is blood type O and the baby is either A or B.