What is phenotype and genotype

A genotype is a set of genes in the human DNA responsible for different traits. It represents your complete identity that you will inherit from your parents and ancestors.
On the other hand, a phenotype is how that trait expresses physically, a characteristic, a visible description of your physical features, including height, eye color, overall health, history of diseases, the ability to gain or lose weight fast, what type of food you like, what you enjoy and what you hate. 

In general, your phenotype is influenced by genotype and the circumstances and conditions you live in.

Musculoskeletal or gastrointestinal

Grade point average. it's literally in the name