If a few people in my family have learning disabilities is it likely that my son will also have a learning disability?

Depends: It depends on the relationship. If "in your family" includes non-blood relatives, then, this is not a concern. If it does, then it should be considered, but other factors (environment, type of school, etc) are also very important.

No: Family history increases the risk but not every individual shares the same pathology. Adhd increases the risk of learning disorders.

Depends: Learning disabilities do have a genetic component. A family history of LD is no guarantee that your child will have it, but it might warrant increased attention to the possibility. Most LD cannot be firmly diagnosed until about age 7 or 8 years.

Possible: There are many specific types of learning disabilities, some of which such as dyslexia are known to have a genetic component.

Some genes have been: Identified in families with a history of language-based learning disabilities, dyslexia (reading disorder) & disorder of written expression. Non-verbal ld's are less common (dyscalculia), but can also "run" in families. Genetic, biological (e.g., prematurity) & environmental factors interact to determine the expression of any gene. Including those for LD & adhd. See the aap's healthy child app.