Which Statement About Genetics and Development Disorders Is Most Accurate

question 124

Multiple Choice

Which statement about genetics and development disorders is most accurate?

• A) Parents of children with autism are not more likely than the general population to have autism themselves.
• B) Concordance rates for autism in identical twins are 95% to 98% and in fraternal twins are 76% to 80%.
• C) Siblings of a child with autism have an up to 90% chance of having autism themselves.
• D) Genetic studies of individuals with autism spectrum disorders make it clear that it is virtually entirely a genetic disorder.

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Definitions:

Sahelanthropus

An extinct genus of hominids believed to be among the earliest on the human lineage, dating back approximately 7 million years ago, known from fossils found in Central Africa.

Homo Sapiens

The species name for modern humans, characterized by a capacity for language, complex problem-solving skills, and social organization.

Teleost

A large group of fish characterized by a movable jaw and a bony skeleton, with over half of all known fish species classified as teleosts.

Shark

A group of elasmobranch fish characterized by their cartilaginous skeletons, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head.