Psychology 2550A/B Chapter Notes -Twin Study, Shyness, Heritability
20 Aug 2013
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Behaviour genetics studies the role of genes in social behaviour and personality. Genetic heritage of humans is contained in dna, arranged in 23 pairs of chromosomes. Dna - long string of small units called nucleotides, 4 types of nucleotides: a, t, g, c. Each dna contains about 1. 5 gigabytes of genetic information. The analogy that dna is a blueprint is far from accurate. A gene is a region of dna that influences a particular characteristic in an organism, and is a unit of heredity. They contain a stretch(es) of dna that specify the structure of a protein to be made. And a stretch called the regulatory sequences, which control whether or not, and how much of, the protein is made. Sometimes different proteins can be made based on the same gene. Although any unrelated people share about 99. 9% of their dna sequence, people"s dna are not identical (unless identical twins )
