Q.
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
| Phenotypes | Genotypes | |
|---|---|---|
| A | 4 | 4 |
| B | 6 | 4 |
| C | 4 | 7 |
| D | 4 | 6 |
NTA AbhyasNTA Abhyas 2020Principles of Inheritance and Variation
Solution:
Blood Group(Phenotype)
Antigens on RBCs
Antibodies in Plasma
Gene Combination (Genotype)
A
A
anti - B
$I^AI^A ; I^AI^i$
B
B
anti-A
$I^BI^B; I^BI^i$
AB
A, B
Nil
$I^AI^B$
O
Nil
anti - A, B
$I^iI^i$
| Blood Group(Phenotype) | Antigens on RBCs | Antibodies in Plasma | Gene Combination (Genotype) |
|---|---|---|---|
| A | A | anti - B | $I^AI^A ; I^AI^i$ |
| B | B | anti-A | $I^BI^B; I^BI^i$ |
| AB | A, B | Nil | $I^AI^B$ |
| O | Nil | anti - A, B | $I^iI^i$ |