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:

Behavioral Activation Therapy

A therapeutic approach that seeks to improve mood by increasing engagement in positively reinforcing activities.

Cognitive-Behavioral Therapy

A widely used therapy approach that focuses on changing negative thought patterns and behaviors to improve mental health.

Severe Depression

An emotional well-being issue defined by an ongoing feeling of sadness or a disinterest in usual pursuits, significantly hindering daily activities.

Antidepressant Medications

Drugs prescribed to relieve symptoms of depression by adjusting the levels of neurotransmitters in the brain.