I have read that you can tell if a blog is dot follow or not in the source code but there is so much code in the source code that I can't find it . Where do I look.

On this same subject when I use a backlink checker that shows the url of my blog post that are linked back to my site, does that mean it is a dot follow blog. I figure since dot fol ow blogs seem to be the only ones that count, the links from blogs to my site might dot follow. What do you think