An example of a genotype is an organism's blood type, while an example of a phenotype is its height. Height can be affected by an organism's poor diet while developing or growing up.
A person's genotype is the special allele combination that is in his or her genetic make-up. Alleles are various versions of genes. A person's hair color and eye color are other examples of genotype. A person's phenotype refers to all the final observable physical features. These features are the result of the interaction between the person's genotype and the environment while he or she was growing up or developing. Weight is another example of a phenotype.