BIL 160 Lecture 7: Chapter 23: Evolution of Populations
8 Feb 2017
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Document Summary
Microevolution: evolutionary change within a species or population. Heredity was poorly understood in darwin"s time. Throughout the 20th century, progressively deeper understanding of genetics. Genetics is the science of heredity and variation. How information is inherited from parents and passed on to offspring in living things. Worked with fruit flies (drosophila) to advance the idea of a gene as the unit of inheritance. Genes: basic unit of heredity (information that species or influence a trait. Genes must be able to be replicated (in different cells of organisms of offspring) Errors in dna replication can lead to mutations : heritable changes in the dna sequence and/or in the traits. Alleles: different variant copies of a gene. Locus: the location of a genes on a chromosome (dna molecule) Different types of natural selection measured experimentally. Other evolutionary changes in the genetics of a population that are not caused by selection.
