A group of 1000 people were chosen at random and surveyed as part of a population study. The participants were asked about their characteristics.
One characteristic that was surveyed was the participant's height measurements.
Sketch a graph in the space below to predict the distribution of individuals' height values.
Name the type of variation shown in the example in part (a).
Another characteristic that was surveyed was hair colour.
It was found that most individuals had black, brown, blonde or ginger hair, but a small number of individuals had hair colours like pink, blue and green.
Describe the factors that can cause variation in hair colour.
Some characteristics that are more likely to be examples of continuous variation are those that are coded for by several genes that work in combination to produce the phenotype.
State the scientific term used for this type of characteristic.
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