Which of the following is an example of an incomplete dominant inheritance?

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Incomplete dominant inheritance occurs when the phenotype of the heterozygote is intermediate between the two homozygotes. Sickle-cell anemia is an example of incomplete dominant inheritance because individuals who inherit one copy of the sickle cell allele have sickle cell trait, which is an intermediate phenotype between the normal phenotype and the sickle cell disease phenotype. Down syndrome, Fragile X, and HIV are not examples of incomplete dominant inheritance.

Which of the Following Is an Example of an Incomplete