Question

the letters nn are an example of a
genotype
phenotype

Explanation:

In genetics, the genotype refers to the genetic makeup of an organism. It represents the combination of alleles (alternative forms of a gene) that an individual has for a particular trait. In this case, "Nn" shows the specific alleles present for a gene, which is characteristic of a genotype. The phenotype, on the other hand, is the observable physical or biochemical trait (like eye color, plant height) resulting from the genotype and environmental interactions. Since "Nn" is about the genetic code (alleles) and not the expressed trait, it fits the genotype definition.

Answer:

Genotype