What characterizes codominance in genetics?

What characterizes codominance in genetics?

• A. One allele overpowers the other expression
• B. Both alleles are masked in the phenotype
• C. Both alleles are fully expressed in the phenotype
• D. Only the dominant allele is expressed

Answer: (C)

Codominance is a genetic phenomenon where both alleles in a heterozygous organism contribute equally to the organism's phenotype, leading to the simultaneous expression of both traits. This means that neither allele is dominant over the other, and as a result, the traits associated with both alleles can be observed fully in the individual. For example, in the case of blood type, individuals who inherit an A allele from one parent and a B allele from another will express both A and B antigens on the surface of their red blood cells, resulting in the AB blood type. Both traits are fully present and visible, demonstrating the essence of codominance. In contrast, other genetic inheritance patterns involve scenarios such as dominance, where one allele masks the effect of another, leading to only one trait being expressed. In codominance, this is not the case, as both alleles are expressed to their full extent.

Codominance is a genetic phenomenon where both alleles in a heterozygous organism contribute equally to the organism's phenotype, leading to the simultaneous expression of both traits. This means that neither allele is dominant over the other, and as a result, the traits associated with both alleles can be observed fully in the individual.

For example, in the case of blood type, individuals who inherit an A allele from one parent and a B allele from another will express both A and B antigens on the surface of their red blood cells, resulting in the AB blood type. Both traits are fully present and visible, demonstrating the essence of codominance.

In contrast, other genetic inheritance patterns involve scenarios such as dominance, where one allele masks the effect of another, leading to only one trait being expressed. In codominance, this is not the case, as both alleles are expressed to their full extent.