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The B blood antigen allele is most frequently found in populations in Asia, particularly in regions such as Central Asia and parts of India. It also has a notable presence among certain ethnic groups in Europe. Overall, the distribution of the B allele varies widely, but its highest frequencies are typically observed in these areas.
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Why is the IB allele dominant to the i allele?
The IB allele is considered dominant to the i allele because it produces a functional enzyme that adds the B antigen to the surface of red blood cells, while the i allele does not produce any antigen. This means that when both alleles are present (IBi), the B antigen is expressed, resulting in the phenotype associated with the IB allele. In contrast, the presence of the i allele does not affect the expression of the B antigen, making IB phenotypically dominant.
Is there such a thing as -AO blood type?
No, there is no blood type designated as -AO. Blood types are classified based on the ABO system (A, B, AB, O) and the Rh factor (positive or negative). The -AO designation combines an A allele with an O allele but does not represent a recognized blood type. Instead, individuals with A and O alleles are classified simply as type A if they have the A antigen present.
Which of the following is not an antigen that may be found on the surface of an erythrocyte a A antigen b B antigen c O antigen d Rh antigen?
The O antigen is not an antigen that may be found on the surface of an erythrocyte. A and B antigens are present in the ABO blood group system, while the Rh antigen is part of the Rh blood group system. O blood type individuals lack A and B antigens on their red blood cells.
What blood has antigen but without antibody?
Surface antigen
What antigens and antibodies are in O- blood type?
there are no antigen in O blood and both A and B antigen in O blood.
What if someone inherits one A allele for blood type and one B allele for blood type what will that person and blood type be?
If someone inherits one A allele for blood type and one B allele for blood type, what will that person's blood type be?
Can two B-positive parents have an A-negative child?
Negative and positive mean nothing here. If both parents are O, then they are homozygous recessive and can only express O. OO X OO This is the only possible genotype for O blood if you have two parents expressing O blood.
If the anti-A antibody causes blood to coagulate which antigen would be present on the red blood cells?
a
Which ABO blood type is least common?
I think it's type ABOf the "normal" A, B, AB, and O typings, AB is the least frequent. Otherwise, Bombay (O type with missing H antigen) phenotype is the least frequent.
What is the medical term for no antigen blood?
Red blood cells with an antigen on their surface are said to be Rh positive, Rh+. Rh negative, or Rh-, do nothave the surface antigen.
What is genotype for blood group B positive?
The genotype for blood group B positive is BB or BO. This means an individual inherits one B allele from each parent, resulting in blood group B. The positive sign (+) indicates the presence of the Rh(D) antigen.
Explain the basis of ABO blood types?
The basis of ABO blood types is the kinds of antigens present on red blood cells determining the blood type. * Genetically, the A type is caused by a dominant allele IA; the B type by another dominant, IB; the AB type by codominance (genotype IAIB), and the O type by a recessive allele (i). Examples: genotype IAIA has phenotype blood type A IAi has type A IBi has type B ii has type O
