Complete Dominance, Incomplete Dominance, Codominance

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What is Complete Dominance?

Back

A type of inheritance where one allele completely masks the effect of another allele in a heterozygote.

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What is Incomplete Dominance?

Back

A type of inheritance where the heterozygote shows a phenotype that is a blend of the two alleles.

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What is Codominance?

Back

A type of inheritance where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that shows both traits.

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Example of Complete Dominance in animals?

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When a brown snake (dominant) and a yellow snake (recessive) are crossed, all offspring are brown.

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Example of Incomplete Dominance in plants?

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When a red flower (RR) is crossed with a white flower (WW), the offspring (RW) are pink.

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Example of Codominance in animals?

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A calico cat shows both orange and black fur, indicating codominance.

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What is a heterozygote?

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An organism that has two different alleles for a particular gene.

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What is a homozygote?

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An organism that has two identical alleles for a particular gene.

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How does incomplete dominance differ from codominance?

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Incomplete dominance results in a blended phenotype, while codominance results in both phenotypes being fully expressed.

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What is the phenotype of a heterozygote in incomplete dominance?

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A phenotype that is a blend of the two parental traits.