PSYCH 2B03 Lecture Notes - Lecture 9: David Buss, Heritability, Birth Order
8 Dec 2015
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Document Summary
Genotype the genes that we"ve got. Phenotype any visible, observable, or measureable characteristic of the individual (height, weight, eye colour, hair colour, ear shape, Monozygotic single fertilized egg, splits early in development, Dizygotic develop from two independently fertilized eggs, just ordinary siblings, 50% identical. Dz twins confused as mz they look very similar, so they think they are mz. Selective placement: correlated environments in adopted twins. Differences between mz and dz twins in environmental similarity. What proportion of the total variance is contributed by genetic factors. Ratio of genetic variance to total variance. Varies from population to population, and over time. Valid only if measures used to calculate it are valid. Rated babies either high, medium, or low in all of these: Level of motor activity how much movement do these infant shows. You could group these infants in correlations of their ratings of these dimensions:
