Lecture 2 - Genetics_2012_OUTLINE

Lecture 2 - Genetics_2012_OUTLINE - Genetic Basis of...

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Genetic Basis of Development Lecture 2 January 11, 2012
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Lecture Overview 1. Goal : to describe the roles of genetics and  epigenetics in developmental psychology 2. Basic terminology and concepts 3. Patterns of genetic inheritance  4. Video on the Human Genome Project 5. Gene-Environment interactions 6. Video on epigenetics 7. Focus on the range of environments
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Terminology 1. Genotype :  the complete set of genes  that comprise ones heredity. 2. Phenotype :  The physical,  behavioral, psychological,  genes and  environment features that result  from the interaction of one’s genes  and the environment. Human development is the result of  genetic and  environmental interactions
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Terminology continued Chromosome  – A threadlike strand _located  in each of cell’s nucleus that carries the  genes_ There are 23 matching pairs of chromosomes  in each cell, including: § Autosomes  -- _regular pairs  ____22___ of the 23 pairs § Sex chromosomes  - 23rd pair -  determine sex of the child Ø XX = __female____ Ø XY = __male__ Father’s genetic contribution determines the  sex
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Terminology continued Chromosomes are made of DNA.   § DNA  (deoxyribonucleic acid) – a double-helix  shaped molecule composed of 4 chemical  compounds  (_______adenine, thymine, guanine,  and cytosine).  § gene  is a segment of DNA along the length of  the chromosome that contains the chemical  blueprint for making particular proteins_.  § Proteins  – the building blocks of life § Expression  – Genes must be “turned on” (often by  the environment) in order to form proteins.
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Terminology continued The order in which the chemical  compounds appear is the code   that determines what protein a  gene will make Humans have about 25,000  genes
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Putting it all together Chemical Compounds
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Genetic Concepts Most genes have two copies and they  appear on a chromosome pair.  Each  copy of the gene is called an allele We get one copy from each parent
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This note was uploaded on 02/14/2012 for the course PSYCH 250 taught by Professor Ward during the Fall '08 term at University of Michigan.

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Lecture 2 - Genetics_2012_OUTLINE - Genetic Basis of...

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