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Chapter+3-+student+version - Genes Environment and...

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1 Genes, Environment, and Development Chapter 3
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2 Lecture Outline Evolutionary Perspectives about Human Development Individual Heredity Genetic Diagnosis and Counseling Studying Genetic & Environmental Influences Individual Differences Genetic Research
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3 Genes & Environment Species Heredity Genetic endowment - - Human examples Two eyes, sexual maturity at 12-14 yrs. Natural Selection: Genes allowing adaptation are passed on 0
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4 Evolution Charles Darwin (1809-1882) Species characteristics How they change over time Main Arguments: There is variation in a species Some genes aid in adaptation more than others Principle of natural selection - - Basis for Evolutionary Psychology Kettlewell’s Moths: 0
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5 Modern Evolutionary Perspectives What we do today was adaptive for ancestors Example: mothers invest more in child rearing - Evolution: gene/environment interaction - Advantageous genes for a particular environment survive 0
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6
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7 Chromosomes store and transmit genetic info - - 44 autosomes and 2 sex chromosomes
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8 Deoxyribonucleic Acid (DNA) long, double stranded molecule each rung consists of chemical substances, “bases” the sequence of bases provides genetic instructions the bases spell out the genetic code A, T, G, C
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9 GENETIC CODE Genes - the functional units of heredity, they determine the production of chemical substances that are the basis for all human traits and abilities.
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10 Individual Heredity - The Genetic Code Zygote: union of sperm and ovum - Each pair influences one characteristic Pair: One from father one from mother Meiosis: Mitosis: cell-division process Creates new cells Throughout life-span 0
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12 Genetic Uniqueness & Relatedness Monozygotic (MZ) twins: 100% related - 2 genetically identical individuals Dizygotic (DZ) twins: 50% on average - Siblings: 50% on average Parent & Child: 50% related, shared Males: XY; Females: XX 0
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13 Translation of the Genetic Code Genes provide instructions for development Eye color and other characteristics Regulator genes turn on/off gene pairs - - ______: genetic makeup/potential E.g., genes for tallness ______: actual/expressed trait (height) 0
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14 3 Mechanisms of Inheritance
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