The Mutation Known as Trisomy 21, in Which an Extra

question 43

Multiple Choice

The mutation known as trisomy 21, in which an extra copy of chromosome 21 is present, is more commonly known as:

• A) Turner syndrome.
• B) Down syndrome.
• C) Klinefelter's syndrome.
• D) Williams syndrome.

---

Definitions:

Marginal Revenue

The increase in income resulting from the sale of one extra unit of a product or service.

Average Revenue

The amount of revenue a company receives per unit of sales, calculated by dividing total revenue by the number of units sold.

Market Equilibrium

A condition in which market supply and demand balance each other, and as a result, prices become stable.

Competitive Industry

A competitive industry is one where numerous producers compete with each other to satisfy the needs and wants of consumers, characterized by free entry and exit and a high level of innovation.