Phenotype Of Blood Type O

April 17, 2021

Additionally if you know your blood type you may also know that your blood type can be positive or negative. This seemingly impossible phenotype result has been referred to as a bombay phenotype because it was first described in that indian city.

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The result is an o phenotype by default since a lack of a and b antigens is the o type.

Phenotype of blood type o. Blood type o is always recessive so it requires two copies of the o allele for an offspring to demonstrate the o phenotype. Blood types a and b are codominant to each other meaning that if a person inherits the a allele from one parent and the b allele from the other parent both traits will be expressed and the offspring will have ab blood type. In addition to the a and b antigens there is a protein called the rh factor which can be either present or absent creating the 8 most common blood types a a b b o o ab ab.

The possible alleles that you could inherit are a b or o. The abo blood system is further complicated by the fact that there are two subtypes of type a and two of ab. There are four major blood groups determined by the presence or absence of two antigens a and b on the surface of red blood cells.

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