BIOL 3600 Lecture Notes - Lecture 9: San Nicolas Island, Island Fox, Blending Inheritance
24 Sep 2018
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Phenotypic variation: humans race, hair color, eye color, etc. Behavioral variation (cultural inheritance: white crowned sparrows variation in songs recorded, some variation is cryptic, only organisms know the difference; they may not look different. Variation in number of chromosomes: karyotype ~ number of chromosomes in nucleus of species, diploid chromosomes numbers for different species, human: 46, chimpanzee: 48, fern: 1260, ciliate: 32000. Genetic code: genetic code is universal, evolved from common origin (organism evolved to have this particular code and organisms have evolved from it, evolutionary redundancy is beneficial. Synonymous vs. nonsynonymous changes: synonymous changes gag gaa (both have same amino acid glu, nonsynonymous change gag gtg (both have different amino acids glu, val, can lead to diseases. Cnvs: cnvs ~ copy number of variations. Darwin believed in blending inheritance: his idea of blending inheritance did not work since after many generations, populations would all look the same.
