Biology / Unit 7 Bio 1559 short lesson, about 20 seconds
The Physical Map
Captions available
The idea
A physical map represents distance in nucleotides between genes or genetic markers along a chromosome, complementing the recombination-based genetic map.
In practice
A physical map states a gene's distance from a marker in base pairs; a genetic map states that distance in recombination-derived map units.
Where people slip
A genetic map's distances are recombination-derived; a physical map's are counted in nucleotides directly.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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