Blood Type Inheritance

March 29, 2021

How blood type is inherited. The most common by far is blood type o followed by type a type b and the least common is blood type ab.

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And there was a 50 chance she d get an a and an o 25 for getting an a from each of you again making her blood type a.

Blood type inheritance. I a and i b are dominant over i therefore only people with ii one gene from each parent have type o blood. Alleles are different possible types of a particular gene in this case the gene s controlling our blood type. That should reassure your husband.

There was a 25 chance she d get two o genes making her blood type o. There are three alleles for the abo gene i a i b and i which produce type a type b and type o blood respectively. People who have i a i a are type a i b i b are type b and i a i b gives type ab.

Each biological parent donates one of two abo genes to their child. Blood inheritance abo blood type. Therefore a person is considered to be d positive whenever the rhd gene is present even though the gene may have only been inherited from one parent.

The rh blood group system is attributable to two genes rhd and rhce which are located on chromosome 1 the rhd gene is dominant so the expression of the d antigen depends upon whether an rhd gene has been inherited from one or both parents. So it was a 1 in 4 chance for your daughter to be type o certainly not a rarity. Blood type is determined by the alleles that we inherit from our parents.

The a and b genes are dominant and the o gene is recessive. Just like eye or hair color our blood type is inherited from our parents. Everyone has an abo blood type a b ab or o and an rh factor positive or negative.

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