Biology / Unit 7 Bio 1561 short lesson, about 20 seconds
Genetic Markers: RFLP, VNTR, and SNP
Captions available
The idea
A genetic marker is a variable DNA sequence used to track chromosomal location; RFLP, VNTR, and SNP are three common types.
In practice
An RFLP marker's pattern comes from restriction-cut fragment lengths, while a SNP marker is a single varying nucleotide position.
Where people slip
RFLP, VNTR, and SNP name different kinds of sequence variation used as landmarks — none is itself a disease-causing mutation.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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