When two alleles of a gene are both expressed in the phenotype of a heterozygote, this is known as incomplete dominance. This is in contrast to complete dominance, where only one allele is expressed in the phenotype of a heterozygote. Incomplete dominance can occur when both alleles of a gene are dominant, or when one allele is dominant and the other is recessive.
Codominance is a type of incomplete dominance in which both alleles of a gene are fully expressed in the phenotype of a heterozygote. This means that the phenotype of a heterozygote is a blend of the phenotypes of the two homozygotes. Codominance is relatively rare, but it does occur in some genes, such as the gene for the ABO blood group.
A practice worksheet on codominant incomplete dominance can be a helpful tool for students to learn about these concepts. The worksheet can include questions about the different types of incomplete dominance, the inheritance of codominant and incompletely dominant genes, and the phenotypes of heterozygotes.
By completing the practice worksheet, students can gain a better understanding of incomplete dominance and codominance. This can help them to better understand the principles of genetics and how they apply to real-world situations.
If you are a student who is studying genetics, then I encourage you to download and complete this practice worksheet. It is a great way to learn about incomplete dominance and codominance, and it can help you to improve your understanding of genetics.
Click here to download the practice worksheet.
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