Complete Dominance, Incomplete Dominance, Codominance

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What is complete dominance?

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Complete dominance is an inheritance pattern where one allele is completely dominant over another, resulting in the phenotype of the dominant allele being expressed in the heterozygote.

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What is incomplete dominance?

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Incomplete dominance is an inheritance pattern where neither allele is completely dominant, resulting in a blended phenotype in the heterozygote.

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What is codominance?

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Codominance is an inheritance pattern where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that shows both traits distinctly.

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Example of complete dominance in plants?

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In pea plants, if a tall plant (T) is crossed with a short plant (t), all offspring (Tt) will be tall, showing complete dominance of the tall trait.

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Example of incomplete dominance in flowers?

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In snapdragons, crossing a red flower (RR) with a white flower (WW) produces pink flowers (RW), demonstrating incomplete dominance.

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Example of codominance in animals?

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In cattle, crossing a red cow (RR) with a white cow (WW) results in roan offspring (RW), where both red and white hairs are expressed.

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What is the phenotype of a heterozygote in incomplete dominance?

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The phenotype of a heterozygote in incomplete dominance is a blend of the two parental traits.

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What is the phenotype of a heterozygote in codominance?

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The phenotype of a heterozygote in codominance displays both parental traits distinctly.

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How does complete dominance affect offspring?

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In complete dominance, the dominant allele masks the effect of the recessive allele, so the phenotype of the offspring reflects only the dominant trait.

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How does incomplete dominance affect offspring?

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In incomplete dominance, the offspring exhibit a phenotype that is a mix of both parental traits, rather than one trait being dominant.