8 Million SNPs in Whole Exome Sequencing vcf file

Question

[L_to_the_m]

Hi, I have an output vcf file from the whole exome from humans. And there are more than 8 Million SNPs, although the human Exome only contains 3.5 Million. How can this be?

[Sam]

Maybe you've got some multi-allelic SNPs?

[L_to_the_m]

Hi, these are already only bi-allelic SNPs.

[Pierre Lindenbaum]

Exome only contains 3.5 Million

https://en.wikipedia.org/wiki/Exome

about 1.1% of the total genome, or about 30 megabases of DNA