Definition
Codominance is a genetic phenomenon where both alleles in a heterozygous individual are fully expressed, resulting in a phenotype that displays characteristics of both alleles simultaneously. This occurs without one allele being dominant over the other, leading to a distinct expression of traits.
Summary
Codominance is a fascinating genetic principle where both alleles in a gene pair are expressed equally, resulting in a phenotype that showcases both traits distinctly. This concept is crucial in understanding how certain traits are inherited and expressed in various organisms, including humans. A classic example of codominance is the ABO blood group system, where individuals with type AB blood express both A and B antigens on their red blood cells. Understanding codominance not only enhances our knowledge of genetics but also has practical applications in fields like agriculture and animal breeding. By recognizing how traits can be expressed, breeders can select for desirable characteristics, leading to improved crop yields and livestock quality. This knowledge is essential for anyone studying genetics or involved in biological sciences.
Key Takeaways
Definition of Codominance
Codominance occurs when both alleles in a gene pair are expressed equally, leading to a phenotype that shows both traits distinctly.
highExamples of Codominance
Common examples include the AB blood type in humans and certain flower colors where both colors appear.
mediumDifference from Incomplete Dominance
Unlike codominance, incomplete dominance results in a blended phenotype, not a distinct expression of both traits.
mediumApplications in Breeding
Codominance is crucial in agriculture and animal breeding, allowing for the selection of desirable traits.
low