Which of the following is relevant to the shared traits in individuals with autism spectrum disorder?

• A. There is a clear isolation from typical development
• B. Shared traits are uniformly weak
• C. Some relatives may exhibit autism-related behaviors in isolation
• D. Only siblings are likely to show related behaviors

Answer: (C)

The answer highlighting that some relatives may exhibit autism-related behaviors in isolation is correct because it reflects the understanding that autism spectrum disorder (ASD) can have a genetic component. Research indicates that autism tends to run in families, meaning that family members, including parents, siblings, and extended relatives, may display traits or behaviors associated with autism, even if they do not meet the full criteria for a diagnosis. This supports the concept of a spectrum where certain characteristics can be present in varying degrees among family members, which provides insight into the heritable nature of some traits related to autism.

This option recognizes the complexity of autism and the fact that while the disorder may manifest differently across individuals, there is a shared genetic and behavioral landscape that connects some relatives. This concept is fundamental in understanding how traits associated with autism spectrum disorder can be distributed among relatives, which plays a significant role in research and theoretical frameworks surrounding ASD.