Genetics is the study of heredity and variations in organisms due to genes.
This refers to an individual's complete set of genes. It's like having all possible recipes for making cookies but not knowing which ones will actually be baked.
This is an observable trait or characteristic resulting from genotype interacting with environment - it’s what kind of cookie you actually get!
Allele: An allele is a variant form of a gene; it's like a different version of the same recipe.