Yes, he has only one testicle.
yes you can (I did)
Can a man with one testicle breed? The answer is YES
Many males have a testicle , which is larger then the other one.
A guy with one testicle will have the same change in his voice that he would have if he had two.
Depends on which testicle....is he in the northern or southern hemisphere?
Either testicle is capable of getting a female pregnant. Even a male with only one testicle can get a female pregnant.
It is normal for one testicle to be a little bit bigger than the other. This is no problem. If one is much bigger, or feels swollen, or has a lump on it, then you should see a doctor as soon as possible. See Related Links below.
No, both testicles do the same job, they aren't differentiated in any way.
Without seeing it is very difficult to say if this is a problem. It is absolutely normal for one testicle to be higher than the other, they do not hang at the same level as if they did they would knock painfully together when you walked. If you still think this is a problem please go and see a doctor who will be quite used to questions like this.
As long as he has one fully functioning testicle, yes, you can have kids. Take Lance Armstrong for example. He has several kids and he lost one testicle to testicualr cancer.
No,