General Psychology notes 2

General Psychology notes 2 - October 7 2010 The Great...

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October 7, 2010 The Great Debate: Lecture 10 Nature: It’s all in the genes - Chromosome o The whole strand of hereditary material o 46 in total (23 from mom 23 from dad) - Genes o Sections of the strand that control chemical reactions o Instructions for growth Nurture: It’s all in the upbringing - John Watson o I can make your baby into anything o Regardless of his/her genetic makeup - Who cares about Nature vs. Nurture o Why such a big argument? o Create a perfect child A Convenient Myth - Simplicity o The either/or dichotomy makes it behavior easy to explain - Purpose o It answers whether we were supposed to be a certain way - Justification o Justifies our actions Things are a bit more complicated - We aren’t just big bags of genes living in a vacuum - We life somewhere… a very social environment o It is quite difficult to figure out exactly how much of a property is due to genes and how much to environment. Some characteristics have simple answers - Sex o Determined by sex chromosomes (X and Y) Two X’s and a mammals are female One X and Y and they are male Genes are not chromosomes
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Think of them as instructions that can be either LOUD or relatively quiet Gene: X- Linked; linked to temperament Gene as Instructions - Two types of genes o Dominant (LOUD) o Recessive (quiet) Gene Pairs - Genes usually come in pairs, which means that if you have to choose between following instructions from the DOMINANT or recessive… youll choose DOMINANT Sex- linked Genes - Sex- linked genes occur ONLY on the X chromosome - Men only need on recessive sex- linked gene to express the trait - Women need two recessive sex- linked genes to express the trait (to cancel out the loud dominant) Sex- limited genes - Sex- limited gene o Occurs in both sexes…but only expressed in one - Sex- limited genes are proof that whether a trait is expressed is NOT ENTIRELY dependent on whether you have the gene for it o Often it may be a combination of hormones and body anatomy that result in gene expression Beards in men Breasts on women Back to that Argument - How much is nature? Nurture? o We could do an experiment We give group A a gene for “kindness” and group B we take that gene away Then we see how kind people from both groups are - It doesn’t make any sense - Twin studies help us to figure out just how much is due to environment o We can’t vary genes…
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o But we can vary environment The Nice Gene - Imagined Study o Researchers want to find out if “Niceness” is based in genes. They get monozygotic twins and find out that… WOW they are very similar in “Niceness.” When one twin is nice, the other is as well! When one is really mean, the other is just as mean! o
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This note was uploaded on 05/05/2011 for the course PSYCH 101 taught by Professor Brill during the Spring '07 term at Rutgers.

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General Psychology notes 2 - October 7 2010 The Great...

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