I have been derelict in my literature researches lately. I just found this link today indicating that human DNA has as many as 100 genes from other species, including bacteria. Imagine what else might be found when scientists actually take the time to really investigate. I have been saying for years now that our chromosomes may have been built up by viruses, bacteria and other lower life forms. You can read more about it in this blog.
Here is a link to the original article.