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Questions and Answers
What type of variation tends to be quantitative?
What type of variation tends to be quantitative?
- Categorical variation
- Continuous variation (correct)
- Qualitative variation
- Discontinuous variation
Which type of graph is typically used to represent continuous variation?
Which type of graph is typically used to represent continuous variation?
- Histogram
- Line graph (correct)
- Scatter plot
- Bar graph
What is the primary difference between continuous and discontinuous variation?
What is the primary difference between continuous and discontinuous variation?
- The quantitative or qualitative nature of the data
- The type of graph used to represent the data
- The presence or absence of intermediates (correct)
- The number of genes involved
Which of the following traits is an example of discontinuous variation?
Which of the following traits is an example of discontinuous variation?
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What controls the expression of a characteristic that exhibits continuous variation?
What controls the expression of a characteristic that exhibits continuous variation?
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Study Notes
Properties of Variation
- Continuous variation: no distinct categories, no limit on the value, tends to be quantitative
- Discontinuous variation: distinct categories, no in-between categories, tends to be qualitative
Examples of Variation
- Height and weight: examples of continuous variation
- Tongue rolling, finger prints, and eye colour: examples of discontinuous variation
Representation of Variation
- Line graph: used to represent continuous variation
- Bar graph: used to represent discontinuous variation
Control of Variation
- Polygenic inheritance: controlled by multiple genes and environment, results in a range of phenotypes between two extremes (e.g. height in humans)
- Oligogenic inheritance: controlled by a few genes, results in a limited number of phenotypes with no intermediates (e.g. A, B, AB, and O blood groups in humans)
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Description
Learn about the characteristics and examples of continuous and discontinuous variation in biology. Understand how these different types of variation are represented and controlled by genetic and environmental factors.
