Continuous variation refers to a characteristic within a species that can vary gradually across a range of values, like height or weight, where individuals can fall anywhere along a spectrum.Discontinuous variation is when a characteristic has a limited number of possible values, and individuals fall into distinct categories. For example, Blood type(People can only have one of the four blood types: A, B, AB, or O), Gender (People are either male or female) , Eye colour (Eyes can only be a certain colour) etc 

Fingerprints are a type of discontinuous morphological variation, which means that the differences between variants are more qualitative than quantitative. Morphological variations are variations in physical traits or outward appearances. Fingerprints are an important method of forensic science, and recovering partial fingerprints from a crime scene is a common technique