A legally adopted child is considered the parent's child just as much as if they had given birth to that child. So being adopted does not affect the rights or the heirship of the deceased parent's house and assets, even if they have biological children, as well.
What does matter, is the state's laws regarding heirships with or without a will. You need to consult an attorney if there is no will to see what your rights are.
no
A legally adopted child has all the rights of a biological child for purposes of inheritance under the state laws of inheritance and intestacy.
Yes. Step children have no right to inheritance unless they were legally adopted. In most states, if legally adopted, they have rights of inheritance only if they are minors. An adult child can be disinherited as long as it is done properly by will. In an intestate estate, a legally adopted child is an heir at law. You can check the laws of intestacy for your state at the related question link provided below.
You don't. You can let your mother know that you don't want anything, but it isn't up to you. If she has a will, she can leave you anything she wants. If she dies intestate, property would flow to you under intestate rules. At that point, you have the right to decline any property that would otherwise go to you. You cannot do this before your mother dies.
A "girlfriend" has no legal rights to her "boyfriend's" estate unless he left property to her in his will. Only a legal spouse or a partner in a legal civil union have rights of inheritance. You can check the laws of intestate (without a will) inheritance in your state at the related question link below.
Provide he did, no, you have no claim on anything related to the paternity side of your family. Were you adopted, or did your mother just tell you this. There should be a court record of it.
Generally, biological and legally adopted children have equal rights of inheritance in most jurisdictions. You can check the law in your state at the related question link.Generally, biological and legally adopted children have equal rights of inheritance in most jurisdictions. You can check the law in your state at the related question link.Generally, biological and legally adopted children have equal rights of inheritance in most jurisdictions. You can check the law in your state at the related question link.Generally, biological and legally adopted children have equal rights of inheritance in most jurisdictions. You can check the law in your state at the related question link.
Adopted children inherit from the adoptive family the same as the adoptive family's biological children do so yes.
none
In order to be adopted by your step mother, your mother would need to sign a waiver allowing it to happen. Without that, you cannot be adopted while your mother has legal parental rights.
You are not a legal heir-at-law of your in-laws. Your spouse is related to them by blood but you are not. You can check the laws of intestate succession in your state at the related question link below.
A spouse does not have any right to a mother in laws inheritance unless they are named specifically in the ill. You could contest the will with an attorney but you probably wouldn't win.
In most jurisdictions a legally adopted sibling is a legal heir. You would need to check the laws of your state. You can find state-by-state intestacy laws linked in the related question below.