How many phenotypes are possible in humans?
There are three common alleles in the ABO system. These alleles segregate and assort into six genotypes, as shown in Table 1. As Table 1 indicates, only four phenotypes result from the six possible ABO genotypes.
What are the 4 blood phenotype possibilities?
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 (IAIA or IBIB, respectively), or heterozygous (IAi or IBi, respectively).
How many blood types can one person have?
There are 4 main blood groups (types of blood) – A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means in total there are 8 blood groups.
Can a person have more than one blood type?
Human and animal chimeras can have two different blood types at the same time. It may be similar amounts of each blood type. For example, in one case, a female chimera had blood that was 61 percent type O and 39 percent type A.
How many genotypes are available in ABO blood grouping of human?
Since there are three different alleles, there are a total of six different genotypes at the human ABO genetic locus. The different possible genotypes are AA, AO, BB, BO, AB, and OO.
What are the 3 types of genotypes?
There are three types of genotypes: homozygous dominant, homozygous recessive, and hetrozygous.
Can AA and SS marry?
AC is rare whereas AS and AC are abnormal. Compatible genotypes for marriage are: AA marries an AA. … And definitely, SS and SS must not marry since there’s absolutely no chance of escaping having a child with the sickle cell disease.