There are two types of variation; continuous and discontinuous Variation.
Continuous variation is variation that has no boundary on the value that can take place within a population. A line graph is used to showcase continuous variation.
Some examples of continuous variation are variations in:
• heart rate
• finger length
• leaf length
Discontinuous variation is variation that has distinct groups for organisms to belong to. A bar graph is normally used to showcase a discontinuous variation.
Some examples of discontinuous variation are:
• tongue rolling
• finger prints
• eye colour
• blood groups
A discontinuous variation with a lot of classes, none of which is extremely small, is referred to as a polymorphic variation.
View also PHYSIOLOGICAL VARIATIONS
The separation of the majority of higher organisms into males and females and the occurrence of different forms of a butterfly of the same species, each coloured to blend with varying vegetation, are examples of polymorphic variation.