What is the genotype for blood type AB?

Asked By: Jara Gsottschneider | Last Updated: 14th June, 2020
Category: science genetics
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A person with blood type A could have the genotype AA or AO. A person with blood type B could have the genotype BB or BO. A person with blood type AB as the genotype AB. And a person with blood type O has the genotype OO.

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Just so, how do you determine the genotype of a blood type?

If someone has blood type A, they must have at least one copy of the A allele, but they could have two copies. Their genotype is either AA or AO. Similarly, someone who is blood type B could have a genotype of either BB or BO. A blood test of either type AB or type O is more informative.

Likewise, what are the alleles for blood type? There are actually three different alleles; A, B, and O that determine a person's blood type. (Although there are three alleles possible, remember that each person only has two genes for every trait.) Of the three alleles, A and B show codominance.

In respect to this, what is phenotype for blood type?

The A and B alleles are co-dominant, and the O allele is recessive. The possible human phenotypes for blood group are type A, type B, type AB, and type O. Type A and B individuals can be either homozygous (AA or BB, respectively), or heterozygous (AO or BO, respectively).

What is an AS genotype?

Genetics. Normally, a person inherits two copies of the gene that produces beta-globin, a protein needed to produce normal hemoglobin (hemoglobin A, genotype AA). A person with sickle cell trait inherits one normal allele and one abnormal allele encoding hemoglobin S (hemoglobin genotype AS).

39 Related Question Answers Found

What blood type is dominant?

ABO Blood Type
The A and B genes are dominant and the O gene is recessive.

Can O+ and O+ have a baby?

That means each child of these parents has a 1 in 8 chance to have a baby with an O- blood type. Each of their kids will also have a 3 in 8 chance of having A+, a 3 in 8 chance of being O+, and a 1 in 8 chance for being A-. An A+ parent and an O+ parent can definitely have an O- child.

Do Babies always have the father's blood type?

No it doesn't. Neither of your parents has to have the same blood type as you. For example if one of your parents was AB+ and the other was O+, they could only have A and B kids. In other words, most likely none of their kids would share either parent's blood type.

What blood types should not have babies together?

If a person of O blood group breeds with a person of B group all the children must be either B or O. If the child is A or AB one of the individuals cannot be the parent. An O and B crossing can not produce an A or AB child. An AB with an O can produce A children or B children but not O.

Can AS and AC genotype marry?


AC is rare whereas AS and AC are abnormal. Compatible genotypes for marriage are: AA marries an AA. AS and AS should not marry, there is every chance of having a child with SS.

How is Rh factor inherited?

The Rh factor genetic information is also inherited from our parents, but it is inherited independently of the ABO blood type alleles. Just like the ABO alleles, each biological parent donates one of their two Rh alleles to their child. A mother who is Rh- can only pass an Rh- allele to her son or daughter.

What is the rarest blood type?

In general, the rarest blood type is AB-negative and the most common is O-positive. Here's a breakdown of the most rare and common blood types by ethnicity, according to the American Red Cross.

What is a positive blood type?

If your blood is A positive (A+), it means that your blood contains type-A antigens with the presence of a protein called the rhesus (Rh) factor. Antigens are markers on the surface of a blood cell. According to the American Red Cross, this is one of the most common blood types.

Does O blood have antibodies?

Blood group O (or blood group zero in some countries) individuals do not have either A or B antigens on the surface of their RBCs, and their blood serum contains IgM anti-A and anti-B antibodies.

What are the 6 genotypes of blood?


The different possible genotypes are AA, AO, BB, BO, AB, and OO. How are blood types related to the six genotypes? A blood test is used to determine whether the A and/or B characteristics are present in a blood sample.

What's the difference between genotype and phenotype?

The two terms are often used at the same time to describe the same organism, but there is a difference between genotype and phenotype:An organism's genotype is the set of genes in its DNA responsible for a particular trait. An organism's phenotype is the physical expression of those genes.

Is blood type AB homozygous?

Human blood type is determined by codominant alleles. The possible human phenotypes for blood group are type A, type B, type AB, and type O. Type A and B individuals can be either homozygous (IAIA or IBIB, respectively), or heterozygous (IAi or IBi, respectively).

How many phenotypes are there for blood type?

The four basic ABO phenotypes are O, A, B, and AB.

Can a woman with blood type A and a man with blood type B have a baby with blood type O?

If the Mother's blood type is B, and the father's blood type is O, then their child must be either B or O. For instance, if both mother and alleged father have type A blood, then the child can only have A or O blood. However, in 1 out of 4 instances, both parents will contribute their recessive O gene to their child.

How does AB blood type occur?


ABO system
When it comes to blood type, you might inherit an A antigen from one parent and a B antigen from the other, resulting in the AB blood type. You could also get B antigens from both parents, giving you a BB, or a B, blood type.

Can you have two blood types?

In some cases, chimerism is diagnosed when a person is found to have two different blood types. It's hard to predict how the condition will manifest or which tissues will be most affected, Tarshish said.

Is Rh negative blood hereditary?

Being Rh-positive or Rh-negative means that either you have the Rhesus D antigen on your RBCs (positive) or you don't (negative). Rh status is inherited from our parents, separately from our blood type. If you do not inherit the Rhesus D antigen from either parent, then you are Rh-negative (15% of us).