Genetic variation
Variation that is inherited from an organism's parents
Environmental variation
Variation caused by an organism's lifestyle and surroundings
Continuous variation
A feature for which individuals in a population vary within a range. There are no distinct categories.
Discontinuous variation
A feature for which individuals in a population fall in to distinct categories.
Normal distribution curve
AKA bell curve: a graph that shows continuous variation. Two extremes, with most people falling in the middle.
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