how the structure of DNA allows it to serve as the basis for inheritance
I think that scientists are still trying to discover the "how" of heredity. However, since this is not my area of expertise, I searched Google under the key words "DNA structure heredity" to get these possible sources:
http://www.chm.bris.ac.uk/motm/dna/dnav.htm
(Broken Link Removed)
http://www.accessexcellence.org/AE/AEC/CC/DNA_structure.php
http://www.britannica.com/EBchecked/topic/262934/heredity/262022/Structure-and-composition-of-DNA
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
I hope this helps. Thanks for asking.