DNA Fingerprinting: Genome variability

[chapsticks]

How much variability exists between the genomes of separate individuals? What is an SNP?

 

[atyy]

An SNP is a single-nucleotide polymorphism. DNA is a sequence of nucleotides, and an SNP is a variation in the population at a particular nucleotide in that sequence. The extent of variability is not fully known.
http://www.ornl.gov/sci/techresources/Human_Genome/faq/snps.shtml
http://snp.cshl.org/

 

[bobze]

Homework question?

 

[Super Mario]

DNA fingerprinting is generally done with STRP short tandem repeat polymorphisms.
I imagine SNPs would be used to determine differences in certain alleles.

From wiki: "The nucleotide diversity between humans is about 0.1%"

Our genome is ~3 billion basepairs, 0.1% of 3 billion is 3 000 000. SO between any 2 people there is said to be ~3 million nucleotide differences!