The physical appearance of an organism, as determined by its genes, is called its phenotype.

Here's a breakdown:

* Genotype: The genetic makeup of an organism, represented by the combination of alleles it possesses for a particular trait.

* Phenotype: The observable characteristics of an organism, which are a result of the interaction between its genotype and the environment.

So, while your genes (genotype) determine the potential for certain physical traits, the environment can also play a role in how those traits manifest (phenotype). For example, your genotype might give you the potential for tall height, but if you experience malnutrition during childhood, you might not reach your full genetic potential.