What phenotypes and genotypes are possible for ABO blood types?
Table 4-5. Correlation of ABO phenotypes and genotypes.
| Phenotype | Possible Genotype |
|---|---|
| A | AA or AO |
| B | BB or BO |
| AB | AB |
| O | OO |
What are the phenotypes of the ABO blood group?
The four basic ABO phenotypes are O, A, B, and AB.
Can different genotypes give the same phenotype?
Can organisms with different genotypes have the same phenotypes? The answer is yes, two different genotypes can result in the same phenotype. Remember, the recessive phenotype will be expressed only when the dominant allele is absent, or when an individual is homozygous recessive (tt) (Figure below).
How many phenotypes and genotypes are possible for ABO blood groups phenotypes genotypes A 4 4 B 6 4 C 4 7 D 4 6?
So from the 6 genotypes, only 4 phenotypes that are blood groups can be seen such as A, B, O, and AB. So the correct answer is B, 6 genotypes, and 4 phenotypes.
In which of the following the ratio of genotype and phenotype are same?
Incomplete dominance is the phenomenon of neither of the two alleles being dominant so that expression in the hybrid is intermediate between the expressions of the two alleles in homozygous state. F2 phenotypic ratio is 1:2:1, similar to genotypic ratio.
What genotype is ABO?
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. Someone with blood type AB must have both the A and B alleles.
Which two genotypes would have the same phenotype?
When an organism has two of the same alleles for a specific gene, it is homozygous (homo means “same”) for that gene. An organism can be either homozygous dominant (TT) or homozygous recessive (tt)….Genotype and Phenotype.
| Genotype | Definition | Example |
|---|---|---|
| Homozygous recessive | Two recessive alleles | tt |
What two genotypes have the same phenotype?
Genotype is the alleles, or the genetic makeup for the organism. Organisms can have the same phenotype when (1) they both have dominant alleles; for example TT or (2) are hybrids; for example Tt. Since the dominant allele will be expressed in the hybrid, both of these cases will produce the same phenotype.
Is blood group and genotype the same?
Each of us has two ABO blood type alleles, because we each inherit one blood type allele from our biological mother and one from our biological father. A description of the pair of alleles in our DNA is called the genotype.
What is the genotype of O+ blood group?
OO
This is because the dominant A allele will overshadow the recessive O allele. However, if someone were to have the genotype AB, they would have blood type AB because both the A and B alleles are dominant….Genotypes.
| Blood Type | Genotype |
|---|---|
| Blood Type B | Genotypes BB or BO |
| Blood Type AB | Genotype AB |
| Blood Type O | Genotype OO |
How are the ABO blood group phenotypes determined?
Six genotypes are involved in the determination of the ABO blood group. Four ABO blood group phenotypes can be identified based on these six genotypes. Environmental exposure may induce the production of corresponding antibodies in the serum of each blood group.
What are the possible genotypes for each 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.
What’s the difference between a phenotype and a genotype?
Phenotypes and Genotypes A phenotype consists of only those traits or antigens that can be directly typed, whereas a genotype is the sum of all genes a person has inherited within a blood group system. Table 4-5 shows ABO phenotypes and possible genotypes if only O, A, and B genes are considered. Table 4-5.
How are blood group antigens determined in blood typing?
Blood typing by antibody-based methods has been the standard for determining ABO, Rh, and “extended” blood group antigens present on red blood cells (RBCs), now >300, 1 since the discovery of the ABO system.