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A cross between a homozygous red flower and a homozygous white flower produces all pink flowers. This is an example of:

A) Incomplete dominance

B) Codominance

C) Complete dominance

D) Polygenic inheritance

1 Answer

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Final answer:

A cross between homozygous red and white flowers producing pink flowers exemplifies incomplete dominance, where phenotypes blend, resulting in intermediate offspring.

Step-by-step explanation:

A cross between a homozygous red flower and a homozygous white flower produces all pink flowers. This is an example of incomplete dominance. In incomplete dominance, the phenotype of the heterozygote offspring is somewhere between the phenotypes of both homozygous parents, resulting in a blend of the parental traits. In the given context, neither the red allele nor the white allele is completely dominant, thereby resulting in offspring with a pink phenotype, which is intermediate. This is observed in plants like snapdragons, where a cross between a homozygous red-petal (CRCR) and a homozygous white-petal (CWCW) parent results in all pink-petaled flowers (CRCW).

User Rob Fonseca
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