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ivann1987 [24]
3 years ago
12

In the ABO series, the gene for blood type O is , while A and B are genes, and AB is .

Biology
1 answer:
Nesterboy [21]3 years ago
6 0

Answer:

Gene for blood type O is recessive

Gene for blood type A and B is dominant

Gene for blood type AB is neither dominant nor recessive but a form of co-dominance

Explanation:

In the ABO blood group,  

A and B are dominant genes, O is recessive genes.  

So the different genotype and its corresponding phenotype is as follows –  

Genotype    Phenotype

AO     A

BO     B

AB     AB

AA     A

BB     B

OO     O

Hence, the two alleles AB occur and express together. Therefore, AB blood group is an example of co-dominance.  

Blood type also varies with the presence of Rh factor. If Rh factor is present, the blood type will represented with a “+” symbol. And if Rh factor is absent, the blood type will be represented by “-“symbol.

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