Human Growth and Development / Unit 2 HGD 0161 short lesson, about 20 seconds
Polygenic and Multifactorial
Captions available
The idea
Most physical, behavioural and health traits are polygenic, governed by many genes; complex traits and diseases reflect multifactorial inheritance, genes plus environment.
In practice
Height and skin colour, each shaped by many genes rather than one.
Where people slip
Single-gene patterns are the exception. Most of what makes people differ comes from many genes interacting with the environment.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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