Imagine That Behavioural Geneticists Have Found a Way to Measure

question 136

Multiple Choice

Imagine that behavioural geneticists have found a way to measure the characteristic of having a "sweet tooth." The correlation between twin pairs is .95 for monozygotic twins and .90 for dizygotic twins.Based on this information, what would a behavioural geneticist conclude about the influence of genes and environment on this trait?

• A)It is mildly influenced by genetics because the heritability coefficient is nearly 0.00.
• B)It is mildly influenced by the environment because the heritability coefficient is nearly 0.00.
• C)It is strongly influenced by genetics because the correlations are so high for both types of twins.
• D)It is influenced about equally by genetics and by the environment because the correlations are nearly identical for both types of twins.

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Definitions:

Slope

In the field of mathematics, the slope is determined by the steepness or angle of elevation of a line, calculated as the ratio between the vertical and horizontal differences of two points on the line.

Positively Related

A relationship in which two variables move in the same direction; as one increases, the other also increases.

Negatively Related

A relationship between two variables where one decreases as the other increases, and vice versa.

Unrelated

Not connected or associated with something else in any way.