BIO207H5 Chapter Notes -Depurination, Thymine, Adenine
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1. mutation theory: variation among organisms resulted from random mutations that. 2. adaptation theory: others thought the variations resulted from adaptation (that is the. 7: dna mutation, dna repair, and transposable elements. Dna can be changed in a number of ways, including through spontaneous changes, errors in the replication process, or the action of radiation or particular chemicals. Chromosomal mutations: changes involving whole chromosomes or sections. Point mutation: a change of one or a few base pairs (another broad type of change in the genetic material). A point mutation may change the phenotype of the organism if it occurs within the coding region of a gene or in the sequences regulating the gene. Point mutations that have been of particular interests to geneticists are gene mutations. Gene mutations: mutations which affect the function of genes. A gene mutation can alter the phenotype by changing the function of a protein.
