It is often cited that humans share 99% (or 98%) of their DNA with chimpanzees.
On the other hand it is stated that siblings share only half of their genes.
What (if any) is the difference between DNA and genes; or, how can the above two claims be reconciled? (I am assuming of course that chimps and humans are more different from each other than two siblings are from each other.)
(I am asking this question as a layperson, who had a little biology in school but not much more.)
June 2015 Addendum: Here is a nice YouTube video just released by MinuteEarth; I do not know how accurate this video is, but as a layperson I found it insightful.
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