PSYCH257 Lecture Notes - Eric Kandel, Developmental Psychopathology, Psychopathology
16 Oct 2011
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One dimensional models attempt to trace origins of a behaviour to a single cause: ex. Linear causal model would trace schizophrenia to a chemical imbalance and nothing else. Genes: long molecules of dna at various locations on chromosomes in the cell nucleus. Understand that physical characteristics like hair and eye colour are strongly influenced by genetics thanks to the work of gregor mendel. Normal human cells have 46 chromosomes arranged in 23 pairs. In each pair, one chromosome comes from the mom and one from the dad: first 22 pairs of chromosomes provide programs for development of body and brain. The last chromosome pair is called the sex chromosome because it determines an individual"s sex. Dna molecules that contain genes have the double helix structure (shape of a spiral staircase). On the double helix are simple molecules bound together and arranged in different orders (x chromosome has roughly 160million base pairs).
