Incomplete and Codominance Inheritance without clear dominant and recessive alleles

Incomplete Dominance Traits where the two alleles are neither dominant or recessive Neither allele is always expressed when present Neither allele is completely covered up by the presence of a different allele

These are both homozygous for Red

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Results of Red x Red All of the offspring are red All of the offspring are homozygous

These are both Homozygous White

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Results of White x White All of the offspring are white All of the offspring are homozygous

Homozygous Red x Homozygous White

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Results of Red x White All of the offspring are Pink All of the offspring are Heterozygous Red and White are “incompletely dominant”

Predict the Offspring

Predict the Offspring

Red and White Cattle

Roan Cattle Roan Cattle have a mix of Red and White fur Red and White are actually both dominant (“codominant”) Both the red and the white alleles will be expressed when present

Predict the offspring

Predict the Offspring

Predict the Offspring

Predict the Offspring

Predict the Offspring

Predict the offspring