Summary: Inheritance patterns describe how genetic conditions are passed through families, including autosomal dominant, autosomal recessive, X‑linked, and complex inheritance, each with characteristic transmission risks and family distribution patterns.
By JAX Clinical Education | July 2026
Autosomal Dominant Inheritance
- Individuals affected in every generation
- Some carriers may not manifest disease
- Males and females have equal chance of passing on mutation
- 50% risk to children
Autosomal Recessive Inheritance
- May be only one generation affected
- Carriers typically do not have condition
- Both parents must be carriers of the mutation
- 25% risk to children
X-linked Inheritance
- No male-to-male transmission
- Though rare, females can be affected if they inherited two mutations
- Many female carriers (one mutation) will have no symptoms; those that do have milder symptoms than seen in males
- Risk for inheriting an X-linked condition:
- 100% for daughters of affected fathers to be carriers
- 0% for sons of affected fathers to be affected
- 50% for daughters of carrier or affected mothers to be carriers
- 100% for sons of affected mothers to be affected
- 50% for sons of carrier mothers to be affected
Complex Inheritance
