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Genetics & Behavior

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Genetics & Behavior - Complete Interactive Lesson

Part 1: Behavioral Genetics

🧠 Genetics & Behavior

Part 1 of 7 — Nature vs Nurture

1. Nature

genetic/biological influences

2. Nurture

environmental influences

3. Interaction

genes AND environment shape behavior

4. Epigenetics

environment affects gene expression

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### Key Points

  • Nature: genetic/biological influences
  • Nurture: environmental influences
  • Interaction: genes AND environment shape behavior
  • Epigenetics: environment affects gene expression

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Part 2: Twin Studies

## Behavioral Genetics

Part 2 of 7 — Behavioral Genetics

1. Heritability

proportion of variation due to genetics

2. Temperament

inborn behavioral style

3. Behavioral genetics methods

twin, adoption, family studies

4. Heritability of intelligence

~50-80%

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### Key Points

  • Heritability: proportion of variation due to genetics
  • Temperament: inborn behavioral style
  • Behavioral genetics methods: twin, adoption, family studies
  • Heritability of intelligence: ~50-80%

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Part 3: Gene-Environment Interaction

## Twin & Adoption Studies

Part 3 of 7 — Twin & Adoption Studies

1. Identical (MZ) twins

100% shared genes

2. Fraternal (DZ) twins

~50% shared genes

3. Higher concordance in MZ twins → genetic influence

Higher concordance in MZ twins → genetic influence

4. Adoption studies separate genetic and environmental effects

Adoption studies separate genetic and environmental effects

Concept Check 🎯

### Key Points

  • Identical (MZ) twins: 100% shared genes
  • Fraternal (DZ) twins: ~50% shared genes
  • Higher concordance in MZ twins → genetic influence
  • Adoption studies separate genetic and environmental effects

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Part 4: Evolutionary Psychology

## Evolutionary Psychology

Part 4 of 7 — Evolutionary Psychology

1. Natural selection shaped behavioral tendencies

Natural selection shaped behavioral tendencies

2. Mate selection preferences (universal patterns)

Mate selection preferences (universal patterns)

3. Parental investment theory

Parental investment theory

4. Criticisms

just-so stories, difficult to test

Concept Check 🎯

### Key Points

  • Natural selection shaped behavioral tendencies
  • Mate selection preferences (universal patterns)
  • Parental investment theory
  • Criticisms: just-so stories, difficult to test

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Part 5: Nature vs Nurture

## Gene-Environment Interaction

Part 5 of 7 — Gene-Environment Interaction

1. Diathesis-stress model

genetic predisposition + environmental trigger

2. Phenylketonuria (PKU)

genetic but treatable by environment

3. Epigenetic changes can be inherited

Epigenetic changes can be inherited

4. Gene × environment interaction in mental health

Gene × environment interaction in mental health

Concept Check 🎯

### Key Points

  • Diathesis-stress model: genetic predisposition + environmental trigger
  • Phenylketonuria (PKU): genetic but treatable by environment
  • Epigenetic changes can be inherited
  • Gene × environment interaction in mental health

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Part 6: Problem-Solving Workshop

## Problem-Solving Workshop

Part 6 of 7 — Problem-Solving Workshop

1. Interpreting heritability statistics

Interpreting heritability statistics

2. Analyzing twin study data

Analyzing twin study data

3. Evaluating nature vs nurture arguments

Evaluating nature vs nurture arguments

4. Designing behavioral genetics studies

Designing behavioral genetics studies

Concept Check 🎯

### Key Points

  • Interpreting heritability statistics
  • Analyzing twin study data
  • Evaluating nature vs nurture arguments
  • Designing behavioral genetics studies

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Part 7: AP Review

## Synthesis & AP Review

Part 7 of 7 — Synthesis & AP Review

1. Genes set the range, environment determines position

Genes set the range, environment determines position

2. Neither nature nor nurture alone

Neither nature nor nurture alone

3. Evolutionary psychology on the AP exam

Evolutionary psychology on the AP exam

4. Critical evaluation of genetic determinism

Critical evaluation of genetic determinism

Concept Check 🎯

### Key Points

  • Genes set the range, environment determines position
  • Neither nature nor nurture alone
  • Evolutionary psychology on the AP exam
  • Critical evaluation of genetic determinism

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