Question

What is the name for a characteristic, such as eye color, of an organism ?

Answer 1

It's a phenotype which means the physical characteristics or traits of an individual organism.

Answer 2

This can be termed the phenotype of that organism.

Physical characteristics that can be observed, such as eye color, are phenotypes.

The genetic code that is coding for this eye color is known as the genotype of that organism, and it cannot be directly seen.