2007-10-18

2007-10-18 - Mendel and the mechanisms of genetic...

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Unformatted text preview: 2007-10-18Mendel and the mechanisms of genetic transmission – A mechanism for Natural Selection•Unitary elements of transmission•Recessive and dominant types•Genotype and phenotypeBiological inheritance in Human Behaviour•Does inheritance imply genetic determination of behaviour characteristics?•Are some things instinctive or genetically determined and others the result of experience or the environment?Nature vs. Nurture•Natural tendency to look for ‘one or the other’ answers•Often politically, religiously, or culturally motivatedoEx. IQ, women’s rights, gay rights, aggression•The question makes no sense•Even ‘natural’ tendencies or characteristics are not immutableoEx. Gender roles, aggressionThe Determinants of IQ•The nature and assessment of intelligence•Illustrations are only examples•Much debate regarding valid measures of intelligence•Drawbacks are that certain questions rely on how much schooling someone has had, and other cultural dependences•Does IQ really matter? YES!oDeaths on highways… see rightoSocio-economic statuesoEarningsoCareersoLongevityoJail time•Consistent and extremely high correlation between IQ scores and socio-economic status, employment, jail•2 different positions•Intelligence – Environment or Genes?oAnswer has always be influenced by political forcesoSocial classes, immigration (Ellis Island type situation), educational and social policy•Deane: scientist who originally derived IQ tests to select people that would benefit from additional or differently structured schoolingDNA is not Destiny•Only a starting in emphasizing that genotype does not necessarily determine phenotype•Genotypic trait may be very different from those expressed in phenotypeoInfluence of experienceMarkings of a Siamese cat: they only develop if the cat grows up in a warm environment, so breeders wrap extremities (ears, legs, tails) to make sure the colour...
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2007-10-18 - Mendel and the mechanisms of genetic...

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