Rare chromosomes list in VCF file

Question

[victorrg]

Hi everyone, I'm new to bioinformatics and I have been working with lately with a VCF file with a strange chromosome.

Right below Y chromosome there are those "chromosomes", GL000192.1 and so on.

What do they mean?

Thanks!

Answer 1

[Marco Pannone]

Answer here: Ensembl chromosome other than 1-22, X, and Y