Types of Variation

· Variation due to genetic factors.

· In genetic variation, organisms fit into a few distinct groups e.g. Blood group, eye

colour, and is usually represented by bar graph or pie chart as the data is discrete.

· Variation due to environmental factors.

· Continuous data, so represented by a line graph, examples are height and weight.

These depend on how we are nurtured, e.g. if we eat enough protein and exercise

regularly, we will grow to our full height potential.

· Normal distribution curves on graphs are used in means and standard deviation.

The mean value is a measure at the highest point on the graph. The standard

deviation is a measure of the width of the curve and shows the spread of results.

· 1 standard deviation 66% (measured either side of the mean at 33% each side)…read more

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