defined:

The observable traits or characteristics of an organism, for example hair color, weight, or the presence or absence of a disease. Phenotypic traits are not necessarily genetic.

explained:

Listen to a detailed explanation. (Requires the free RealPlayer download)

Dr. Robert Nussbaum, formerly of the National Human Genome Research Institute's Laboratory of Genetic Disease Research, defines phenotype.

illustrated:

View illustration

related
terms:

gene, genotype

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