Which of the Following Is True of Down Syndrome

question 1

Multiple Choice

Which of the following is true of Down syndrome?

• A) It primarily occurs in African American children.
• B) It occurs when genetic imprinting goes awry.
• C) Its symptoms include retardation of motor and mental abilities.
• D) It is caused by the presence of an extra copy of chromosome Y.

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Definitions:

Marginal Cost

The extra cost triggered by the production of an additional unit of a product or service.

Marginal Revenue

The additional income from selling one more unit of a good or service.

Marginal Cost

The hike in overall costs when one extra unit of a product or service is produced.

Economic Profits

The difference between total revenue and total costs, including both explicit and implicit costs, representing surplus remaining after all costs have been paid.