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W2 - Brain and Behaviour (Behaviour Genetics Model* image (Child's…

- - - - Additive Heredity (effects of genes add up)
      - Dominant/Recessive Heredity (dominant influence expression instead of recessive gene)
        
        Basic Dominant / Recessive pattern (recessive 25% chance)
        
        X-linked Dominance (same length chromosome / boys than girls)
        
        Pattern of genes inform disorders
        
        Dominant / Recessive (Cystic fibrosis, Huntington disease, FOXP2)
        
        X-linked Inheritance (fragile X)
        
        Chromosomal Anomalies (Down Syndrome, Turner, Kleinfelter)
        
        Gene Anomalies (Williams syndrome, Angelman syndrome)
- - - - Within-group (larger) vs. between-group IQ differences = size has no relation with IQ
      - Causal direction = ambiguous
      - Within-family correlations (size, cognitive ability) = 0
      - Uncertain with region of brain relates to intelligence (sex differences are very small)
    - - Brain region linked to psychological trait, can't explain behaviour
      - Environment influences brain structure
      - Genetics can't explain behaviour
      - Causality is difficult to establish