what si observational characteristics or phenotype
A phenotype is an individual's observable traits, such as height, eye color, and blood type. The genetic contribution to the phenotype is called the genotype.Some traits are largely determined by the genotype, while other traits are largely determined by environmental factors.Definition from: Talking Glossary of Genetic Terms from the National Human Genome Research Institute.he genetic contribution to the phenotype is called the genotype. Some traits are largely determined by the genotype, while other traits are largely determined by environmental factors. Definition from: Talking Glossary of Genetic Terms from the National Human Genome Research Institute.