Texas Family Code - FAM § 162.017. Effect of Adoption

(a) An order of adoption creates the parent-child relationship between the adoptive parent and the child for all purposes.

(b) An adopted child is entitled to inherit from and through the child's adoptive parents as though the child were the biological child of the parents.

(c) The terms “child,” “descendant,” “issue,” and other terms indicating the relationship of parent and child include an adopted child unless the context or express language clearly indicates otherwise.

(d) Nothing in this chapter precludes or affects the rights of a biological or adoptive maternal or paternal grandparent to reasonable possession of or access to a grandchild, as provided in Chapter 153.