Chapter 1 1.1 Genetics and the Questions of Biology Geneticists study not only hereditary mechanisms, but all biological mechanisms. The key to genetic analysis of a biological property is to examine the effects of mutations. DNA is the genetic material It is important to realize that there is no stage in the life of an organism when genetic information ceases to be read. DNA replication, mutation, and the processing of the information specified by the DNA continue through the life of the organism. Message: genetic analysis, using organisms with mutations, is a powerful method for investigating biochemical, physiological, and developmental pathways. Genetics also lies at the basis of understanding evolution. o Evolutionary change is the consequence of different rates of reproduction of individual organisms having different heritable characteristics. 1.2 The Molecular Basis of Genetic Information The structure of organisms and their active physiological processes are based for the most
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This note was uploaded on 06/15/2009 for the course BIO 89165 taught by Professor Saxena during the Summer '09 term at University of Texas.