Russian law says no to it, but I know a lot of people does have Russian and USA citizenship!
According to the US, she or he would have American citizenship only. The Bolivian government's citizenship policy would decide if the child had access to dual citizenship. Dual here is spelled with an "a," not an "e." Duel with an "e" means a fight between two people.
Yes, you can keep you and your son's duel citizenship and still marry the father of your son in the UK.
If the parents are US citizens, then the child gets duel citizenship (citizenship in the country he/she is born in [depending on local laws], and US citizenship). Any person naturalized in the US or by American parents is a US citizen.
Yes only if that person is a American applying for dual citizenship in Brazil. A person from Brazil would be unable to keep citizenship in Brazil if they wanted US citizenship. because the US requires you to give up your citizenship to all other countries except Canada citizenship.
The Drifters.
Yes. My sister moved to Canada and now has duel citizenship. Many Americans with strong ties to places like Israel and Ireland have duel citizenship. Each country has their own laws. If you had a grandparent who was born in Ireland, then you are eligible for Irish citizenship.
Yes, I believe he does.
Contact the nearest US consulate, go there and register your child's birth. The certificate they will give you will act as citizenship certificate. Then apply for your child's passport so that s/he can travel to the US with you too.
If you are from the US, he wants to move there, and later apply for US citizenship: the answer is no. But if you are from a country which prevents its citizens from having another citizenship (e.g. Norway, Denmark, Finland, South Korea, and Japan), then he must renounce both these nationalities to apply for the one from your country.
No. citizenship has to do with where you were born, and where your parents were born. It has nothing to do with marriage.
Being an African American does not necessarily mean they have duel citizenship. In general, countries define citizenship based on ones descent, place of birth, marriage, and/or naturalization. An example of duel citizenship is when, lets say, an Australian citizen travels to the United States, marries a United States citizen and has children. Those children have both, US and Australian citizenship. The Term African American really comes from the slave trade when Africans were transported by ship to the Americas, in which they became, "African Americans." The African Americans today did not have a choice to be "African Americans" because their ancestors were brought here. Thus, the term 'African American' is not racist in anyway but more politically correct and duel citizenship does not apply to all African Americans.
Your child will be an American citizen automatically because American parents = American child. However, the Italian law is different than ours. You are not Italian just because you are born in Italy. if you are born in Italy to foreign parents, and you reside there until you are 18, then you can apply for citizenship. At that point, the child can be a duel citizen (the US now recognizes duel citizenship).