Question

What is a type of inheritance for the human blood type gene shown here? A. Incomplete dominance. B. Codominance. C. Autosomal. D. Sex-linked.

Answer 1

Answer;

B. Codominance.

Explanation;

• Codominance is a type of inheritance in which alleles of a gene pair that is heterozygous are expressed fully. Thus the resulting phenotype is neither dominant or recessive.

• Blood grouping is a good example of codominance; The genotypes; IAIA IAiO IBIB IBiO IAIB iOiO, are the blood types: A, A, B, B, AB, and O, respectively. Since both A and B are dominant to O, which is recessive, they share the trait when both expressed (type AB).

Answer 2

IAIA IAiO IBIB IBiO IAIB iOiO
These are the blood types: A, A, B, B, AB, and O, respectively.
Since both A and B are dominant to O, which is recessive, they share the trait when both expressed (type AB).
This is called [B. Codominance.]