Genotype vs Phenotype | Understanding Alleles

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Thanks for stopping by, today we are going to talk about Genotypes vs Phenotypes.

When you have a trait, that is, a pair of alleles, such as Bb or bb. We can refer to them in two different ways.

The first is the Genotype, which refers to the exact pairing of alleles. For example, if we are dealing with eye color and there are two alleles, “B” for blue eyes and “b” for green eyes, then there are three possible genotypes, BB, Bb, or bb, these are the genotypes. The genotype isn’t concerned with the expression of the trait, only the pairing of the alleles.

The other way to refer to a trait is by the Phenotype, which is its expression. Using our previous example, there are only two phenotypes, blue eyes or green eyes. The phenotype isn’t concerned with the pairing of the alleles, the genotypes BB and Bb both give the same phenotype, blue eyes.

So to recap the genotype refers to the pair of alleles for a trait, in this case, the specific letters, and the phenotype refers to the expression of the trait, how it looks or functions.

And that’s it. I know this can be a confusing concept, so hopefully that helped, and if you have any additional questions, throw them in the comments.

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