If one is a step brother can asperger still run in the family?

Yes, Asperger's syndrome (AS) can still run in the family even if the affected individuals are step siblings. This is because AS, like many other neurodevelopmental disorders, is believed to have a genetic basis. While the exact genetic mechanisms underlying AS are not fully understood, research suggests that multiple genes may be involved in its development.

If one individual in a family has AS, there is an increased risk that other members of the family, including step siblings, may also be affected or have a higher likelihood of developing AS or other related neurodevelopmental conditions. However, it's important to note that AS is not solely determined by genetics alone, and environmental factors may also play a role in its manifestation.

If you or someone in your family is concerned about the possibility of AS, it is advisable to seek evaluation and support from qualified healthcare professionals experienced in diagnosing and managing neurodevelopmental disorders. Genetic counseling may also be helpful in understanding the potential genetic components and risks within the family.