The gene for tongue rolling is dominant. the mother’s genotype is tt, and the father’s genotype is tt. what are the chances that he will be able to roll his tongue?

it's false.

"every person has their limitations which prevent us from accomplishing something. some are better than mathematics for example and some are worse. those people who are worse might never be able to become mathematicians, but that does not mean that they would not be great at doing something else."