Welcome to the codominant incomplete dominance practice worksheet, an educational resource designed to illuminate the intricacies of genetic inheritance. This worksheet explores the fascinating concepts of incomplete dominance and codominance, unlocking the secrets of how traits are passed down through generations.
Through engaging examples and interactive exercises, this worksheet will guide you on a journey to understand the fundamental principles of genetics. Discover how alleles interact to shape phenotypes, and delve into the genetic basis of traits that exhibit incomplete dominance or codominance.
Incomplete Dominance: Codominant Incomplete Dominance Practice Worksheet
Incomplete dominance occurs when neither allele in a heterozygous genotype is dominant. Instead, both alleles are expressed in the phenotype, resulting in an intermediate or blended trait.
An example of incomplete dominance is the inheritance of flower color in snapdragons. When a red-flowered snapdragon is crossed with a white-flowered snapdragon, the offspring have pink flowers. This is because the red allele and the white allele are both expressed in the heterozygous offspring.
The genetic basis of incomplete dominance is that the alleles are codominant. This means that neither allele is able to completely mask the expression of the other allele.
Codominance, Codominant incomplete dominance practice worksheet
Codominance is a type of inheritance in which both alleles in a heterozygous genotype are fully expressed. This results in a phenotype that shows both traits.
An example of codominance is the inheritance of blood types in humans. The alleles for blood type A and blood type B are codominant. When a person has one allele for blood type A and one allele for blood type B, they have blood type AB.
This is because both the A allele and the B allele are expressed in the phenotype.
The genetic basis of codominance is that the alleles are codominant. This means that neither allele is able to completely mask the expression of the other allele.
FAQs
What is the difference between incomplete dominance and codominance?
Incomplete dominance occurs when neither allele is dominant, resulting in a blended phenotype. Codominance occurs when both alleles are fully expressed, resulting in a distinct phenotype for each allele.
How does incomplete dominance affect the inheritance of traits?
Incomplete dominance leads to intermediate phenotypes, where the offspring exhibit a combination of the traits expressed by both parents.
Can codominance occur in humans?
Yes, codominance is observed in the inheritance of blood types in humans, where both alleles for blood type A and B are expressed, resulting in the AB blood type.
