GE Interplay – Block 2

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What do genetic influences on behavior involve?

Environmental determinants

Probabilistic propensities (correct)

Absolute certainty

Predetermined programming

Why are genes not considered destiny when it comes to complex traits?

Because there are multiple genes influencing complex traits (correct)

Because genes are deterministic in nature

Because genes have no influence on complex traits

Because the environment outweighs genetic effects

What is heritability?

The proportion of phenotypic variance explained by genetics (correct)

The nongenetic influences that make family members dissimilar

The correlation between MZ and DZ twins

The shared environmental influences within a family

What do shared environmental influences refer to?

Nongenetic influences that make family members similar Signup and view all the answers

Why does finding genetic influences on complex traits not diminish the importance of the environment?

Because environmental influences still play a significant role Signup and view all the answers

What does twin correlation measure?

The similarity between twins in terms of a trait Signup and view all the answers

'Genetic influence on behavior is just that — an influence or contributing factor, not something that is preprogrammed and deterministic.' What does this statement imply?

'Genetic influence' is one factor among many factors influencing behavior Signup and view all the answers

'Finding genetic influences on complex traits does not mean that the environment is unimportant.' Why is this statement important to understand?

'Environmental influences' still contribute significantly to trait development Signup and view all the answers

'Most complex traits are influenced by multiple genes.' What does this imply about the determination of complex traits?

'Complex traits' have genetic contributions from various genes Signup and view all the answers

'Genetic influences are quantified by heritability.' Why is heritability essential in understanding genetic influences?

'Heritability' provides insights into the genetic contribution to observed differences Signup and view all the answers

What is the first law of behavior genetics?

The effect of being raised in the same family is smaller than the effect of genes. Signup and view all the answers

What does high heritability NOT imply?

Genetic determinism Signup and view all the answers

What does heritability describe?

Genetic influences at a specific moment in time and environment Signup and view all the answers

Why is IQ's heritability being 70% not an indicator that the child will be the smartest in the class?

Heritability is blind to average effects Signup and view all the answers

What does heritability NOT consider when describing the influence of genes?

Potential for future genetic changes Signup and view all the answers

Which statement best describes heritability?

Measures how much of a trait is influenced by genes in a specific context Signup and view all the answers

Why does high heritability in IQ not mean that a child will mimic their biological parents' intelligence?

Heritability disregards the impact of the environment Signup and view all the answers

What aspect of behavior genetics does heritability primarily focus on?

'Genetic vs. environmental influences on individual differences Signup and view all the answers

'Heritability is about differences in individuals, not of a particular individual.' What does this statement emphasize?

'Heritability' focuses on variations between individuals due to genetics Signup and view all the answers

'Heritability describes what is and not what could be.' What does this statement suggest about heritability?

'Heritability' explains existing behavioral differences due to genetics only Signup and view all the answers