For example, Phe- indicates the inability to synthesize phenylalanine or Lact indicates the ability to utilize lactose as a carbon source. The superscripts and 'r may also be used to designate sensitive or resistant
For example, Phe- indicates the inability to synthesize phenylalanine or Lac+ indicates the ability to utilize lactose as a carbon source. The superscripts 's' and 'r' may also be used to designate sensitive or resistant
Genotype is indicated by three lower case letters (usually reflecting the phenotype) with a fourth upper case letter to indicate specific genes involved, all of which are italicized, for example, phea or lacz
• Genotype is indicated by three lower case letters (usually reflecting the phenotype) with a fourth upper case letter to indicate specific genes involved, all of which are italicized, for example, pheA or lacZ
Although, naturally, there may be a large number of individuals of a species with slightly different phenotypes, microbiologists and in particular microbial geneticists try to work with organisms that are genetically identical. Consequently, in the laboratory, we work with pure cultures where microbes are descendent from the same original parent to minimize the genetic variability. That parent may often be referred to as the wild-type
Although, naturally, there may be a large number of individuals of a species with slightly different phenotypes, microbiologists and in particular microbial geneticists try to work with organisms that are genetically identical. Consequently, in the laboratory, we work with pure cultures where microbes are descendent from the same original parent to minimize the genetic variability. That parent may often be referred to as the wild-type
Section a substantial basis for genetic variation
Section A substantial basis for genetic variation
Part a Three classical experiments 1. Transformation 2. Bacteriophage infection 3. Reconstruction of tobacco mosaic viruses
Part A Three classical experiments 1. Transformation 2. Bacteriophage infection 3. Reconstruction of tobacco mosaic viruses