Edexcel IAL Biology 3.21 Multiple alleles, polygenic inheritance and variation

Identify the contributing loci and environment, use the table to total allele effects and represent the range with a correctly labelled continuous distribution.

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 3.21—Multiple alleles, polygenic inheritance and continuous variation 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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3.21—Multiple alleles, polygenic inheritance and continuous variation question 1