Edexcel A-Level Biology AS 3.21 Multiple Alleles Polygenic Inheritance and Continuous Variation Questions

Use allele contributions, probability and environmental effects to explain continuous variation and interpret normal distributions in biological traits.

Exam points

define polygenic inheritance through multiple genes at different loci affecting one trait
interpret additive allele data to predict or compare quantitative phenotypes
draw or recognise a labelled normal distribution for continuous variation

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The common wombat is endemic to Australia and Tasmania.
The photograph shows a common wombat.

Figure for Question Edexcel A-Level Biology AS 3.21 Multiple Alleles Polygenic Inheritance and Continuous Variation Questions question 1 — Edexcel A-Level Biology AS

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The height of a wombat is a result of polygenic inheritance.

State what is meant by the term polygenic inheritance with reference to wombat height.

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Edexcel A-Level Biology AS 3.21 Multiple Alleles Polygenic Inheritance and Continuous Variation Questions question 1