Biology 2581B Chapter Notes - Chapter 3, 9, 13, 20, 26: Transposable Element, Gene Duplication, Transfer Dna
19 Jan 2020
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Alleles represent specific dna sequences that code for specific enzymes and other proteins for example, mendel"s peas: the locus that determines whether the pea is round or wrinkled is a sequence of. Bacteria possess a number of mechanisms by which they can gain and lose dna: lost: Gained: gene duplication insertion of transposable elements, horizontal gene transfer. Rna then became relegated to the role of information storage and transfer. Dna, which is more stable, eventually replaced rna as the primary carrier of genetic information. Rna is still needed in many biological processes such as transcription, replication, rna processing, translation, and others there are several approaches to inferring evolutionary relations and constructing phylogenetic trees. Distance approach evolutionary relationships and inferred on the basis of the overall degree of similarity between organisms: a number of phenotypic characteristics or gene sequences are examined, and the organisms are grouped based on overall similarity.
