Autism Concordance and Influencing Factors

The video discusses the interplay between genetics and environmental factors in autism, emphasizing that no single factor causes autism. It highlights twin studies showing higher concordance rates among fraternal twins, suggesting a significant role of shared environments. The sibling recurrence rate is noted to be higher than the general population rate, indicating genetic and environmental influences. The video concludes by stressing the importance of understanding environmental impacts on autism spectrum disorder (ASD) development.

What is believed to be the cause of autism according to scientists?

• A specific environmental toxin

• A viral infection during pregnancy

• An interaction between genetics and environmental factors

• A single genetic mutation

Which of the following statements is true about the factors influencing autism?

• Autism is caused by dietary choices.

• Only genetic factors are responsible for autism.

• Environmental factors alone can cause autism.

• Both genetic and environmental factors can influence the risk of autism.

What did the twin study suggest about the role of the environment in autism?

• The environment has no impact on autism.

• The shared environment is critical in understanding autism.

• Only identical twins show concordance for autism.

• Fraternal twins have no genetic similarities.

How are fraternal twins genetically similar to siblings?

• They have no genetic similarities.

• They share the same genetic makeup as siblings born at different times.

• They are more genetically similar than identical twins.

• They are genetically identical.

What is the concordance rate of autism among fraternal twins compared to siblings?

• Higher than siblings

• Lower than siblings

• Equal to siblings

• No concordance observed

What is the sibling recurrence rate of autism?

• 1%

• 50%

• 10%

• 20%

How does the sibling recurrence rate of autism compare to the general population rate?

• It is the same as the general population rate.

• It is lower than the general population rate.

• It is higher than the general population rate.

• There is no data on sibling recurrence rates.

What role does the environment play in the development of autism spectrum disorders?

• It can only decrease the risk.

• It is the sole cause of autism.

• It has no role.

• It can either increase or decrease the risk.

Which of the following is NOT a factor in the development of autism?

• Interaction between genes and environment

• Environmental influences

• Dietary habits

• Genetic predisposition

What is the general population rate of autism?

• 1%

• 5%

• 10%

• 20%