With regard to alleles that encode different forms of beta-hemoglobin in humans and their relation to malaria, which of the following are examples of phenotypes?

Question

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Phenotypes refer to observable characteristics or traits of an organism. A) Sickle-cell anemia is a phenotype because it is a physical manifestation of the underlying genotype. C) Susceptibility to malaria is also a phenotype because it describes how likely an individual is to be affected by malaria, which is influenced by their genetic makeup. D) Sickled red blood cells are a direct observable characteristic of the sickle-cell trait or disease, making it a phenotype. B) AA, AS, SS are genotypes, not phenotypes, as they describe the genetic makeup rather than observable traits. E) is not a phenotype but rather specifies an allele, which is a variant form of a gene.

With Regard to Alleles That Encode Different Forms of Beta-Hemoglobin