See link provided below for a listing of state-by-state adult adoption laws.
Yes they do.
Generally yes. The laws on this vary from state to state. Most states in the USA allow for this; it's generally called "Adult adoption"
Adoption laws vary by state, but as of 2014, All states except Utah allow single gay people to adopt, and about 25 states allow full joint adoption for gay couples.
No. A person can not be adopted once they reach the age of 18 in the UK.
The majority of US states do not allow the emancipation of minors. Those states that have emancipation procedures rarely grant such rights. If a decree is granted it can be rescinded at any time for any reason before the minor reaches the state's age of majority. The minimum age for filing an emancipation petition in states that have status is 16. The issue of adoption would not be relevant if the minor meets all other requirements.
Adult adoption varies from state to state, but many states allow adult adoption. Check with your state Department of Children and Families and see if they have guidelines or visit the family court to see if there is a form for such a petition. If possible, you should consult with an attorney who specializes in family and domestic law, and adoption.
No, in 1996 the Removal of Barriers to Interethnic Adoption Provisions amended the Multiethnic Adoption Act of 1994 (MEPA), making this kind of discrimination illegal.
Adoption law varies by state, but in the US, all 50 states allow gay people to adopt, though as of 2017, gay people are still routinely denied adoption based on discrimination.
The person is now an adult and therefore an adoption could not be "reversed' or expunged. The adult can change his or her name back to their birth name or to any other they might choose.
The child must be available for adoption...that means the parental rights of the birth parents must be terminated legally. I have one friend who signed over her rights to someone else so that an adoption could take place.
The laws on this vary from state to state; inquire about adult adoption with your state's equivalent to the "Department of Children and Families".
Talk to an adult you trust and consider adoption.