Genes and Heredity

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Genes and Heredity

• Chapter 2
• Psychology of Childhood
• Dr. Greg Cook

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Genetic Structures, p. 44
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Karyotype, p. 43
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Example of a genetic code, p. 45
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Examples of gene locations, similar to p. 46
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Monozygotic vs. Dizygotic Twins
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• Gene Defects
• Chromosomal Abnormalities

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Down Syndrome, p. 61
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Risk of Down Syndrome by Mothers Age, similar
to p. 61
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p. 62
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Ultrasound Image, Prenatal Screening for Birth
Defectsp. 63
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Ultrasound image, twins
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Prenatal Screening Genetic Testing, p. 64

• Amniocentesis, after 14th week, risk 1/200 of
  causing serious problem
• CVS, 8th week or after, risk is 2 X amnio risk,
  faster results

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G X E Range of Reaction, p. 67
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G X E Canalization, similar to p. 68
Canalization genes limit the effects of the
environment Experiential Canalization the
environment limits the epxression of our genes
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G X E Probabilistic Epigenesis, p. 70
Fruit flies grow 2nd pair of wings. Chickens grow
teeth.
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Heritability Estimates

• See list of examples, p. 77
• See example findings from twin and adoption
  studies, p. 78

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Heritability increases with childs age!p. 79
Niche-Picking passive evocative
active p. 69
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Next Class

• Chapter 3, please!