Blood Type Phenotype

November 26, 2020

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. Thus a person who inherits an a allele and a b allele will have type ab blood and make both a and b blood cells.

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As a result you can have blood type a or b.

Blood type phenotype. When both inherited alleles are o the genotype is homozygous recessive and the blood type is o. These antigens may be proteins carbohydrates glycoproteins or glycolipids depending on the blood group system some of these antigens are also present on the surface of other types of cells of. While blood types a and b are codominant to each other they are both dominant to the o allele.

Blood type o is always recessive so it requires two copies of the o allele for an offspring to demonstrate the o phenotype. Major blood group phenotypes and their frequencies 1 3 001 abo abo. There are six possible genotypes genetic makeup of inherited alleles and four phenotypes expressed physical trait for human abo blood types.

Two more important terms when discussing inherited traits are phenotype and. A blood type also known as a blood group is a classification of blood based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells rbcs. This blood phenotype was first discovered in bombay now known as mumbai in india by dr.

Hh or the bombay blood group is a rare blood type. The a and b alleles are dominant to the o allele. It is mostly found in the indian sub continent india bangladesh pakistan and parts of the middle east such as iran.

Blood group phenotypes alloantibodies causing haemolytic transfusion reactions or haemolytic disease in the fetus and newborn are dependent on the frequency with which alloantigens and alloantibodies occur.

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