Researchers at the University of Montreal have confirmed that — with the exception of people in sub-Saharan Africa — people today carry a tiny bit of the same X chromosome carried by Neanderthals.
Read more: http://www.ottawacitizen.com/technology/Research+confirms+modern+humans+part+Neanderthal/5121582/story.html#ixzz1SXYhYKwK
Those with 23andme results can go to http://esquilax.stanford.edu/#explore
Load your unzipped genome
Select your majority population
Click on Explore in the Menu Box
Select an Exercise
Check your Neanderthal matches.
Perkins mentions that so far, the highest matches have been at 26. In my case I have 9 Neanderthal alleles in my personal genotype.