Biology / Unit 6 Bio 1185 short lesson, about 20 seconds
Genetic Maps from Recombination Frequency
Captions available
The idea
A genetic map places genes along a chromosome in order, using recombination frequency between pairs of genes to estimate the distance between them.
In practice
Alfred Sturtevant, in Morgan's laboratory, used recombination frequencies to order several Drosophila genes along one chromosome in 1913.
Where people slip
Map distance tracks recombination frequency, not physical DNA length — the two only estimate each other, never equal each other exactly.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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