Distinction between incomplete domaince and co domaince
Answers
Codominance and Incomplete dominance are two types of genetic inheritance. Codominance essentially means that no allele can block or mask the expression of the other allele. On the other hand, incomplete dominance is a condition in which a dominant allele does not completely mask the effects of a recessive allele.
Two common examples of incomplete dominance are height and hair color. Offspring will likely not have the exact same height or hair color as one of their parents but will often have a blend between the two parent’s phenotypes.
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Incomplete Dominance vs Codominance: What's the Difference?
Posted by Melody Douglas | Nov 16, 2017 1:41:00 PM
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Are you studying genetics but don’t understand the codominance vs. incomplete dominance differences? What’s the difference between incomplete dominance and codominance? Why is it important to know?
In this guide, we explain what incomplete dominance and codominance are, as well as how they’re different, using real-world examples to make these terms clear and easy to understand.
What Is Incomplete Dominance? What Is Codominance?
What is the difference between codominance and incomplete dominance? Before we get into comparing them, let’s first explain what incomplete dominance and codominance are. They are both important terms to know when studying genetics and inheritance patterns.
Incomplete dominance and codominance are both types of inheritance where one allele (a form of a gene) isn’t completely dominant over the other allele. This results in a new phenotype (the physical characteristics of an individual).
Incomplete Dominance
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Incomplete dominance is when there is a blending of the two alleles that results in a third phenotype that doesn’t look like either of the parents. The classic example is when a white flower and red flower are crossed. With incomplete dominance, all their offspring would be solid pink flowers, a completely new phenotype. You don’t see either of the parent phenotypes (i.e. white or red) in the offspring.
Two common examples of incomplete dominance are height and hair color. Offspring will likely not have the exact same height or hair color as one of their parents but will often have a blend between the two parent’s phenotypes.
Codominance
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In codominance, both alleles are expressed together in the offspring. If we cross a red flower and white flower that have a codominance inheritance pattern, the offspring would be flowers with red and white patches on them. Unlike incomplete dominance, where the two parent phenotypes are blended together into a new phenotype, in codominance, both parent phenotypes show up together on the offspring.
The most common example of codominance is the AB blood type. If a person with A type blood and a person with B type blood have a child, that child could have type AB blood where both phenotypes are fully expressed.