incomplete and codominance

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What is Incomplete Dominance?

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A genetic situation in which one allele is not completely dominant over another, resulting in a blended phenotype in heterozygous offspring.

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What is Codominance?

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A genetic situation where both alleles in a heterozygous individual are fully expressed, resulting in offspring with a phenotype that shows both traits.

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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 may have pink flowers (RW).

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Example of Codominance in animals?

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In calico cats, both orange and black fur colors are expressed due to codominance of the fur color alleles.

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What is the phenotypic ratio of a cross between a red flower (RR) and a speckled flower (RB)?

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2 red flowers and 2 speckled flowers.

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What is the result of a cross between two heterozygous individuals (RW x RW) in Incomplete Dominance?

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1 red (RR), 2 pink (RW), and 1 white (WW) flower.

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What does it mean if a trait is said to be 'dominant'?

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A dominant trait is one that will express itself in the phenotype even if only one copy of the allele is present.

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What does it mean if a trait is said to be 'recessive'?

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A recessive trait is one that will only express itself in the phenotype if two copies of the allele are present.

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How can you identify Codominance in a genetic cross?

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Look for a phenotype that displays both traits distinctly, such as a flower with both red and white patches.

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What is the expected phenotypic ratio for a cross between two homozygous parents (RR x BB) in Codominance?

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All offspring will show the codominant phenotype (RB).