Post on 14-Jan-2016
Microbial Genetics - DNA Microbial Genetics - DNA TransferTransfer Review of Information Transfer in
Cell Recombination Transfer of DNA &Genetic
Recombination in Bacteria– Conjugation– Transformation– Transduction
Microbial Genetics - DNA Microbial Genetics - DNA TransferTransfer
Microbial Genetics - DNA Microbial Genetics - DNA TransferTransfer Recombination – process by which DNa is
broken and repaired resulting in an exchange of DNA between two DNA molecules to form new combinations of genes
Eukaryotic - crossing over during meiosis Prokaryotic - occurs when DNA is
transfered from one cell to another (transfer from a doner to a recipient)
Microbial Genetics - DNA Microbial Genetics - DNA TransferTransfer
GeneticRecombination
Microbial Genetics - DNA Microbial Genetics - DNA TransferTransfer
Conjugation
Microbial Genetics - DNA Microbial Genetics - DNA TransferTransfer
Normal or Low Frequency Conjugation
Microbial Genetics - DNA Microbial Genetics - DNA TransferTransfer
High Frequency Conjugation
Transformation
Transduction
Microbial Genetics - Microbial Genetics - RegulationRegulation Three types of regulation
– Constitutive - gene is always turned on
– Repression - gene is normally turned on but can be turned off in response to a metabolic signal
– Induction - gene is normally turned off but can be turned on in response to a metabolic signal
Microbial Genetics - Microbial Genetics - RegulationRegulation Types of
Regulation of mRNA synthesis– Induction - lac
operon– Repression - trp
operon
Microbial Genetics - Microbial Genetics - RegulationRegulation