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Variation

Variation refers to observable differences among individuals of the same species, such as differences in humans like height and complexion. There are two types of variation: continuous variation, which is influenced by both genetics and the environment, and discontinuous variation, which is determined solely by genetics. Continuous variation shows slight differences and no distinct groups, while discontinuous variation shows large differences and allows for distinct groupings.

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13 views1 page

Variation

Variation refers to observable differences among individuals of the same species, such as differences in humans like height and complexion. There are two types of variation: continuous variation, which is influenced by both genetics and the environment, and discontinuous variation, which is determined solely by genetics. Continuous variation shows slight differences and no distinct groups, while discontinuous variation shows large differences and allows for distinct groupings.

Uploaded by

tadichigiyegiye
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Variation

 Variation refers to observable differences between individuals of the same species.


For example in humans, there are males and females but say among females there are
differences in terms of complexion, height, weight etc.

NB: When we talk about variation we cannot make a comparison between a human
and a dog for example because they are not of the same species.

 There are 2 types of variation: Continuous variation and Discontinuous variation.

Continuous variation Discontinuous variation


it is determined by both genes and the organisms it is determined by genes only
environment
there are slight differences between individuals there are large differences between individuals
individuals cannot be placed into distinct separate groups individuals can be placed into distinct separate
groups
there are intermediates there are no intermediates
if data of continuous variables is used to draw a graph, a if data of discontinuous variables is used to draw a
normal distribution curve is obtained graph, a bar graph is obtained

examples: height, weight, complexion, shoe size, leaf examples: sex, tongue rolling, eye colour, blood
length groups

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