PSYCH 3F03 Lecture Notes - Lecture 5: Adenine, Autosome, Robert Trivers
15 Sep 2016
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Psych 3f03 lecture 5 evolution and human behaviour. Simple mendelian inheritance: works in many cases, many traits we thought were caused by single gene polymorphism are actually polygenic: Many forms of polygenic traits: 2 examples. When there are two dominant and one recessive allele. Both dominant alleles are expressed not intermediary (that happens but is not codominance) Human abo blood type: a & b are dominant o is recessive. Phenotypes are in parentheses on the second row. Mitosis is what happens during normal somatic cell division (cells making clones of each other) Meiosis cell dna"s are lined, splits up and each gamete gets half of genetic material along with random assortment. 4 chemicals in our dna code for the expression of proteins: a = adenine, c = cytosine, g = guanine, t = thymine, u = uracil (rna) These form corresponding pairs across the chromosome: a binds to t, c binds to g.
