ANT 101 Lecture Notes - Lecture 12: Pleiotropy, Mendelian Inheritance, Phenylketonuria
Document Summary
Governed by the action of several genes. When one gene produces more than one phenotypic expression. Continuous traits governed by alleles at more than one genetic locus. Skin color is contributed by at least 6 different genes and 12 alleles. You do not fall into one category or the other. Continuous traits can be measured and then statistically analyzed. Many traits that interest us in evolution are continuously distributed. Distribution of phenotypes into just a few discrete categories. Expression can be heavily influenced by environment. Distribution of phenotypes ins continuous with no discrete categories. Phenotype can be changed with script diet from birth. Genotype + environment = phenotype (re)discovery of mendel"s laws. The public learned about mendel"s laws ~1900. These two things fir together hand and hand. Synthesis of darwin"s theory of natural selection with mendel"s theory of heredity. Continuous characters are the result of many genes interacting with many environmental factors, with a small effect on the trait.
