This episode clarifies the fundamental distinction between genotype and phenotype in the study of inherited traits.

Genotype refers to the specific combination of genetic alleles an organism possesses, using the terms heterozygous and homozygous to describe allele pairings.

In contrast, phenotype represents the observable characteristics of an individual.

The episode emphasizes that phenotype is a result of the interplay between an organism's genetic makeup and environmental factors, providing earlobe attachment as a concrete illustration of this concept.

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