yes
Yes it is. It's better for the relationship to be mother-son or father-daughter though, but your hamster babies should be perfectly normal.
Yes, Pekingese brother and sister can mate, but the resulting puppies will be inbred and may or may not be healthy.
they will have babies
yes i did it with someone
Yes the can but you will have to be very careful
Yes, but there puppys may have medical problems
yes,but the newboren pitbull might be disformed.
The possessive form of the hamster belonging to my sister is "my sister's hamster".
No.
They can, however, this is an example of insest and the offspring will be at a higher risk for abnormalities.
no.
Yes.