Question

In human blood grouping, the four basic blood types are type A, type B, type AB, and type O. The blood proteins A and B are :

• A. sex-linked traits
• B. codominant traits
• C. simple dominant and recessive traits
• D. incomplete dominant traits

Answer 1

The correct option is B codominant traits

• A person has one of the four blood groups: A, B, AB, or O. This blood group system is controlled by a gene which has three diffrent forms $I^A,I^B,$ and $I^0$.
• The genes $I^A$ and $I^B$ shows no dominance over each other and are codominant.
• Genes $I^A$ and $I^B$ are dominant over $I^0$.
• Genes contain information that makes protein. Hence the information that makes protein. Hence the genes that codes for blood protein are codominant traits.
• Codominance is the type of inheritance in which two alleles of the gene are expressed separately to yield different traits in an individual and such traits are called codominant traits.