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The genes which determine the ABO phenotype are inherited in a codominant fashion.
ABO blood groups are determined by the presence or absence of terminal sugars on the red cell membrane. These sugars are placed on the red cells by enzymes (glycosyltransferases) that transfer specific sugars to the appropriate carbohydrate chain acceptor. The genes that code for the specific glycosyltranserases are located on chromosome 19. Therefore, the ABO antigens are indirect products of the genes.
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What are The blood proteins A and B?
The blood proteins A and B are antigens found on the surface of red blood cells that determine blood type. Individuals with blood type A have A antigens, while individuals with blood type B have B antigens. Blood type AB individuals have both A and B antigens.
Why O blood group can donate anybody?
O blood has no major proteins that A and B blood have. For example: If someone had B blood with its specific proteins, this person cant receive A blood because it has the specific A blood proteins that will cause bad clotting to stop it. O blood (with no different proteins) wont affect any blood.
A person with the alleles ii has what blood type?
Which statement describes the blood type of a person with the alleles IAi? It is type AB because I and i are codominant. It is type AB because A and i are codominant. It is type A because i is dominant and A is recessive. It is type A because A is dominant and i is recessive.
What is the blood type of person who is heterozygous having A and B alleles codominant?
Blood types is a good example of codominance. There are three alleles for blood type, that can be represented as IA, IB, and i. IA and IB are both dominant to i, but when an individual inherits one of each the former two alleles (IAIB), he or she will have type AB blood. Instead of one allele being straightforwardly dominant to another, or the resulting phenotype being a halfway stage between the two alleles, the phenotype has aspects directly resulting from each allele.
Can a person with blood type AB donate blood to a person with blood type A explain?
Each blood type has it's identifying proteins, and will reject blood with the wrong proteins. Type A blood is anti-B, type B blood is anti-A, type O blood has both, and type AB blood has neither. Imagine if someone with AB blood tried to donate to someone with A. AB blood has identifying proteins A and B. The type A blood would recognize the B proteins and kill the cells. The same thing would happen with B, which would recognize the A proteins and kill the cells. Type O blood would recognize and reject both the A and B proteins and reject them. However, if someone who is type AB gives to AB people, their blood does not destroy neither protein A nor B, so it would accept it.
Are there any traits in humans that are codominant?
Blood grouping. Type A and type B alleles are co-dominant over type O, so if you inherit a type A allele from one parent and a type B allele from the other, you will have both antigens on your red blood cells and you'll be type AB. One does not dominate over the other, both are expressed if present.
What blood types can be formed by crossing A genes with B genes?
Crossing A genes with B genes can produce offspring with blood types A, B, AB, or O. The A and B genes are codominant, meaning they both express themselves in the AB genotype, while the O gene is recessive to both A and B.
Which human blood group lacks proteins in the red blood cells?
Blood type O lacks the antigen proteins of A and B. Blood type O is the universal donor.
How many alleles are there for blood type-?
There are three alleles for blood type: IA=Blood type A IB=Blood type B i=Blood type O The alleles for blood type A and B are codominant so when someone contains the IA and IB alleles, their blood type is AB.
Blood type in humans is controlled by which alleles?
Human blood type is determined by codominant alleles.
What is the blood type of a person whose plasma contain anti-b clumping proteins?
blood type A
Which blood type is characterized by codominance?
The blood type AB is characterized by codominance because both the A and B alleles are expressed equally on the surface of the red blood cells. This results in individuals with blood type AB having both A and B antigens present.
