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Lecture 9

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Carleton University
PSYC 2600
Chris Motz

Lecture 9 Tuesday, February 1, 2011 - Biological Domain - Picture of twins separated at birth o Reunited at age 31 o Both firefighters o Identical twins, share 100% genetic material o Prescription glasses- both had bad eyesight o Similar mustache styles- both had same face shape o Both balding- again because of genes o Enjoy hunting and fishing o Like the same brand of beer (genes for beer? Interesting) - For personality, how much is shaped by pre-existing genetics? o And how much is shaped by experiences (environment)? Overprotective, underprotective parents, etc. - Goals o Genetics  We have a geneticist in the department of psychology  Direct connection between genes and behavior  Human Genome, heritability, etc. o Environment  Shared and non-shared  Genes and environment o Physiology  No genes for personality—they code for physical characteristics  We’ll code for differences in physiology, up to behavior - *Next set of notes: finish biological domain - Previously, we were looking at basic tendencies and characteristic adaptations (which contain self-concept) - This time: Biological Bases o For Costa and McCrae, they’re peripheral component—but have a big impact on traits - We’re done with basic tendencies - Biological Bases o Peripheral component of system- not core to our understanding of personality o Might at some point talk about where the personality comes from (angry streak from father, etc.) o NO GENES FOR PERSONALITY—they code for physiological function, and that has influence on who we are - Relatively easy to build a building based off of blueprints, but we have to use a different process for person o Need a different set of blueprints—DNA o String of nucleotide molecules- 4 molecules- simplistic, but in various repeating patterns o Our DNA comes from two parents- half from each o Combine to form cell with compete set of DNA - Human Genome contains 30,000 to 40,000 genes (range varies according to sources) o Textbook says 20,000 to 30,000 o Doesn’t really matter- won’t ask this on test o All located on 23 pairs of chromosomes - Genome: all the DNA of organism - Gene: a piece of DNA string - Chromosome: a threat of DNA- we have 23 pairs, or 46 chromosomes o Length varies - DNA: results of Rosalind Franklin’s research o She was doing research in early 1950s o Not a lot of women in science at the time o Discovered DNA molecule o Huge race going on to find it, crack the code, etc. o She was hired by King’s College in London o There was another researcher at King’s—Maurice Wilkins—he just happened to be out of town when she got hired o He returned, thought she had been hired to work as his assistant—she was really hired to work as his colleague (equal) o Rocky start—never collaborated in research o Her research: specialized in taking pictures (at molecular level)—through the use of x-rays o Very involved process—would take weeks to set up, take photograph, interpret o Eventually, she got the right photograph and identified it as DNA—began to write up results for publication o Maurice Wilkins as well as Watson and Crick (from Cambridge) looked in her lab, went through her materials and found this photograph—they started writing their publication quickly o She didn’t realize this so she took her time to publish o Their article came out just before hers, they got first authorship credit o She quit her position, did other research o **To crack the DNA code, she used x-rays, which are radioactive  1958, at age of 37, she died of ovarian cancer  Her research killed her o 1962, Nobel committee decided to award Nobel Prize for discovery of genetic code  But they don’t award it to dead people  They gave the award to Watson and Crick  Rosalind Franklin got erased from history - DNA in nucleus of cell—tell you how to build a cell, but also tell cell what role it will play in body o Sugar-phosphate background, the rungs are the base-pairs (A,T,C,G) o Incredibly simplistic code for complex creation o Only works because it’s so long o We have about 3 billion of these base pairs clustered in 30,000-40,000 genes, which are spread out over chromosomes o Some gene
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