Psychology 3229A/B Lecture Notes - Lecture 3: Ovulation, Anisogamy, Hominidae
24 Apr 2014
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Behaviour genetics - types of gene variation that result in behavioural variation. Allelic variation at single gene results in variation in behaviours. Mendelian inheritance patterns (traits that depend upon 1 or 2 loci) Two heterozygous parents: offspring will be 3/4 round; 1/4 wrinkled. Basenji hound puppies - fearful, retreat from strangers. Cocker spaniel puppies - bold, approach strangers. F2 generation - 3/4 fearful (ff, ff, ff); 1/4 bold (ff) Sickle-cell anemia - anemia, but increased malarial resistance. Each generation, study how much cotton is used to make a nest; researchers then select for large and small nest, and never crossed them. Usually determined through controlled breeding experiments (or study of family trees) Pattern of inheritance suggests number of genes and alleles involved. Determination of molecular aspects of gene requires further study to identify gene and its. Polygenism - idea that trait depends upon lots of genes that contribute in a lot of ways to the trait regulation.
