The Best Way to Study the Relative Contribution of Heredity

question 58

Multiple Choice

The best way to study the relative contribution of heredity and environment is to compare

• A) identical twins reared together and apart.
• B) adopted children to their adoptive and biological parents.
• C) identical and fraternal twins.
• D) fraternal twins reared together and apart.

---

Definitions:

Cost and Quality

The relationship between the expense of a product or service and its level of excellence or worth, often a key consideration in consumer purchasing decisions.

Minor-Points Close

A close in which the salesperson asks the prospect to make a low-risk decision on a minor element of a product.

Balance-Sheet Close

A sales technique where the salesperson presents a summary of the costs and benefits of a product or service to the customer, similar to a balance sheet in finance.