It's great that you're showing an interest but why now and why genetics? I'm assuming you're here on this particular forum because it's related to a religious question?
Genetics and the sciences and technologies that support its study are very, very new - we're only just beginning to know anything about it really. But already it's absurdly complicated; unless you're exteremely bright and very determined, you're extremely unlikely to get to a position where you can argue cogently about it with someone who actually KNOWS.
For me it's like big physics or advanced mathematic, there comes a point very early on when you simply have to accept what you are being told by those that have spent their lives working in the field and read about it in the popularising literature.
What astounds me is that people with absolutely no knowledge of the subject come here and tell us it's wrong. They need to aquire a little humility. (I'm not referring to you here - there's nothing wrong with asking questions.)
If you're looking for a good, readable, book on evolution generally, I'd recommend Steve Jone's Almost like a whale. it's a re-write of Darwin's Origin of Species using up to date examples - including genetics, which Darwin had no idea about.
Life, don't talk to me about life - Marvin the Paranoid Android