The goal of classification is to determine genetic

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ly present. The goal of classification is to determine genetic similarity, though in the past genetic similarity had to be inferred based on phenotypic similarity. As a consequence of the sequencing of organism genomes, the science of classification is very much in flux (classifications are changing often) as phenotype-based classification is augmented by genotype-based classification. All is not happy even with genotype-based classification, however, since horizontal gene transfer greatly complicates estimations of genetic similarity, with different parts of genomes displaying different levels of genetic similarity between organisms. Note that though classification can be considered strictly in terms of genetic similarity, traditionally in genetics similarity is considered to be an indication of “similarity by decent,” a.k.a., of blood relatedness, a.k.a., of evolutionary relatedness. Taxonomic Rank Taxonomy: Classification We’ll consider each in turn. We’ll spend quite a bit of time in this chapter and in lab on methods of bacterial identification. Strain O157:H7 One difficulty is deciding how different two isolates must be before one describes them as different species rather than as dif...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online