What causes a monosomy of chromosome 20?

3 answers

Sorry, I meant what would be the result of monosomy 20?
Actually,forget the last post. What causes monosomy chromosome 20?
Since this is not my area of expertise, I searched Google under the key words "monosomy 'chromosome 20'" to get these possible sources:

http://www.mad-cow.org/chr20_rings_trisomy.html#mmm3
http://cat.inist.fr/?aModele=afficheN&cpsidt=18016399
http://www.makingcontact.org/index.php?ci=321
(Broken Link Removed)

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.