Emma and Anna Are Identical Twins Who Were Adopted by Different

question 112

Multiple Choice

Emma and Anna are identical twins who were adopted by different families a few weeks after their birth. Although genetically identical, they grew up with different physical and psychological characteristics. For example, though both inherited a tendency to grow large, Anna was slim and athletic because of the active lifestyle practiced in her adoptive family. This variability can be explained by how

• A) each zygote is unique.
• B) longevity genes can make an individual less vulnerable to certain diseases.
• C) for each genotype, a range of phenotypes can be expressed.
• D) mutated genes can be a source of genetic variability.

---

Definitions:

Profit or Loss

The financial result of business operations, calculated as the difference between revenue and expenses, indicating the financial health of the business.

Excess Capacity

A situation where a firm is operating below its maximum output level, indicating that the company can produce more goods with the existing resources if there is higher demand.

Marginal Cost

The rise in overall expenses incurred from the production of an additional single unit of a product or service.

Demand Schedule

A table that shows the quantity of a good or service that consumers are willing and able to purchase at various price levels at a given time.