Genetics assessment statements

Phenotype: The physical expression of a genotype and environment

For many phenotypes it is a combination of genotype and environment. An example of this is height which is contributed by genes and your diet. Skin colour is genes and amount of UV exposure. 

Polygentic inheritance: Phenotypes that are controlled by a large amount of genes

This type of inheritance leads to continuous variation where there are no set catigories such as height or eye colour. 

There is also discontinuous variation that is caused by there being one set of genes contributing to a factor such as gender where there are only males and females.