What is the genotype for blood type AB?
Just so, how do you determine the genotype of a blood type?
If someone has blood type A, they must have at least one copy of the A allele, but they could have two copies. Their genotype is either AA or AO. Similarly, someone who is blood type B could have a genotype of either BB or BO. A blood test of either type AB or type O is more informative.
Likewise, what are the alleles for blood type? There are actually three different alleles; A, B, and O that determine a person's blood type. (Although there are three alleles possible, remember that each person only has two genes for every trait.) Of the three alleles, A and B show codominance.
In respect to this, what is phenotype for blood type?
The A and B alleles are co-dominant, and the O allele is recessive. The possible human phenotypes for blood group are type A, type B, type AB, and type O. Type A and B individuals can be either homozygous (AA or BB, respectively), or heterozygous (AO or BO, respectively).
What is an AS genotype?
Genetics. Normally, a person inherits two copies of the gene that produces beta-globin, a protein needed to produce normal hemoglobin (hemoglobin A, genotype AA). A person with sickle cell trait inherits one normal allele and one abnormal allele encoding hemoglobin S (hemoglobin genotype AS).