Variation with a Species
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18 Terms
Variation
Differences between individuals of the same species
Genetic variation
Differences caused by genes (inherited)
Environmental variation
Differences caused by surroundings
Continuous variation
A full range of values with no clear categories
Discontinuous variation
Variation with distinct categories
Polygenic
Characteristic controlled by many genes
Monogenic
Characteristic controlled by one gene
What is variation?
Differences between individuals of the same species
What causes genetic variation?
Differences in genes from meiosis and random fertilisation
What causes environmental variation?
Climate, diet, lifestyle, accidents
What is continuous variation?
A full range of values with no categories
Give an example of continuous variation
Height
What is discontinuous variation?
Variation with clear categories
Give an example of discontinuous variation
Blood group
What usually causes continuous variation?
Many genes + environment (polygenic)
What usually causes discontinuous variation?
One gene only (monogenic)
What does polygenic mean?
Controlled by many genes
What does monogenic mean?
Controlled by one gene
