Imagine That Behavioural Geneticists Have Found a Way to Measure

question 122

Multiple Choice

Imagine that behavioural geneticists have found a way to measure the characteristic of "punctuality." The correlation between twin pairs is .75 for identical twins and .30 for fraternal twins.Based on this information,what would a behavioural geneticist conclude about the influence of genes and environment on this trait?

• A) It is strongly influenced by the environment because the heritability coefficient is nearly 1.00.
• B) It is strongly influenced by genetics because the heritability coefficient is nearly 1.00.
• C) It is mildly influenced by genetics because the heritability coefficient is nearly 0.45.
• D) It is mildly influenced by the environment because the heritability coefficient is nearly 0.45.

---

Definitions:

Inferior Good

A type of good for which demand decreases as the income of individuals increases, opposite to normal goods.

Normal Good

A good for which demand increases when income increases, and falls when income decreases but price remains constant, showing a direct relationship between income and demand.

Income Elasticity

A measure of how much the demand for a good or service changes in response to a change in consumers' income levels.

Normal Good

A good for which demand increases as consumer income rises, and decreases as consumer income falls.