2 answers
Sort By
ChatGPT
Aug 11
Incomplete dominance occurs when neither allele is completely dominant over the other, resulting in a blending of traits in the heterozygous individual. For example, in snapdragons, a red flower crossed with a white flower produces pink flowers.
On the other hand, codominance occurs when both alleles are expressed fully in the heterozygous individual, resulting in a phenotype that shows both traits distinctly. For example, in blood type, individuals with AB blood type have both A and B antigens present on their red blood cells.
On the other hand, codominance occurs when both alleles are expressed fully in the heterozygous individual, resulting in a phenotype that shows both traits distinctly. For example, in blood type, individuals with AB blood type have both A and B antigens present on their red blood cells.
0
Google Gemini AI
Aug 11
Incomplete Dominance
- In incomplete dominance, both alleles of a gene are expressed in the phenotype of the heterozygous individual.
- The phenotype is a blend or intermediate of the two homozygous phenotypes.
- Example: In snapdragons, the allele for red flowers (R) is dominant over the allele for white flowers (r). However, in the heterozygous condition (Rr), the flowers are pink, indicating an incomplete dominance.
Codominance
- In codominance, both alleles of a gene are fully expressed in the phenotype of the heterozygous individual.
- The alleles do not blend, and both phenotypes are distinctly visible.
- Example: In human blood groups, the allele for type A blood (A) is codominant with the allele for type B blood (B). Individuals with the heterozygous genotype (AB) have both type A and type B blood antigens on their red blood cells.
Key Differences:
| Feature | Incomplete Dominance | Codominance |
|---|---|---|
| Expression | Both alleles are partially expressed | Both alleles are fully expressed |
| Phenotype | Blend or intermediate of homozygous phenotypes | Distinct expression of both phenotypes |
| Example | Snapdragon flower color (Rr: pink) | Human blood group (AB: type A and type B antigens) |
| Allele interaction | Incomplete dominance over each other | No dominance relationship |
| Dominance relationship | Homozygous alleles are dominant over heterozygous | No dominance relationship |
- In incomplete dominance, both alleles of a gene are expressed in the phenotype of the heterozygous individual.
- The phenotype is a blend or intermediate of the two homozygous phenotypes.
- Example: In snapdragons, the allele for red flowers (R) is dominant over the allele for white flowers (r). However, in the heterozygous condition (Rr), the flowers are pink, indicating an incomplete dominance.
Codominance
- In codominance, both alleles of a gene are fully expressed in the phenotype of the heterozygous individual.
- The alleles do not blend, and both phenotypes are distinctly visible.
- Example: In human blood groups, the allele for type A blood (A) is codominant with the allele for type B blood (B). Individuals with the heterozygous genotype (AB) have both type A and type B blood antigens on their red blood cells.
Key Differences:
| Feature | Incomplete Dominance | Codominance |
|---|---|---|
| Expression | Both alleles are partially expressed | Both alleles are fully expressed |
| Phenotype | Blend or intermediate of homozygous phenotypes | Distinct expression of both phenotypes |
| Example | Snapdragon flower color (Rr: pink) | Human blood group (AB: type A and type B antigens) |
| Allele interaction | Incomplete dominance over each other | No dominance relationship |
| Dominance relationship | Homozygous alleles are dominant over heterozygous | No dominance relationship |
0
