yes
In most of the countries, If you are 18 or above you can get your own birth certificate.
No, you have to get a copy of your birth certificate.
No - they simply list the names of the biological father and mother. A birth certificate does not prove the parents were married at the time the birth was registered.
You haven't explained whose birth certificate. If it's her biological child then she must sign the birth certificate. The biological parents of the child sign the birth certificate.
To the parents, maybe.
A passport cannot be obtained without the signature of the other parent.
Yes, in many jurisdictions, two females can be listed on a birth certificate as parents.
Yes, it is illegal to copy a birth certificate without proper authorization.
Illegal immigrant children are given a US birth certificate. The parents remain illegals.
There are a couple reasons. One make sure it a state certified birth certificate and not a Certificate of birth from the hospital, these usually have your foot prints on them. Two could be an adoption matter. In either case this is a matter that should talk to your parents about.
Yes, if it is a second certificate issued for an adoption. The original birth certificate lists the biological parents -- if known. The state doesn't care how they feel about each other.
No, since they are not your biological parents.