Hela have Y chromosome?

[tujchl]

HI:
Since I need H3K4me3 chip-seq data, I download it from UCSC (http://hgdownload.cse.ucsc.edu/golde....narrowPeak.gz).
One strange thing is the data show enrishment regions on Y chromosome, as far as I know Hela don`t have Y chromosome.
someone explain it for me?
thanks

[ECO]

http://en.wikipedia.org/wiki/Pseudoautosomal_region , perhaps?

[tujchl]

thanks ECO:
Do you mean the peak region on Y chromosome can be explained by homologous region between Y chromosome and other chromosomes?
but Why UCSC retain those regions even knowing Hela don`t have Y chromosome?
any special reason?