PPT-Recombination Genetics of Bacteria

SEM V CC12 Unit6 Recombination Genetics of Bacteria Part I Conjugation History The process was discovered by  Joshua Lederberg  and  Edward Tatum  in 1946 Bacterial Conjugation Definition. Gil . McVean. There are no new questions in population genetics. …only new types of data. Genome sequences of entire populations. Data with linkage to deep phenotype information. Data from multiple species. MUTAGENESIS. DNA DAMAGE. DNA REPAIR. RECOMBINATION. MUTAGENESIS. Mutations. Mutations are heritable permanent changes in the base sequence of DNA.. Point mutations may be . transitions. (e.g. GC→AT) or . Summary of assumptions so far. We have covered the role of chance (parent choice), demography (population size) and mutation, in shaping genetic diversity. . Neutral Wright-Fisher . models. Parents are always chosen at random. This means no new mutations affect reproductive success of parents, i.e. . Secreted by B lymphocytes. Great diversity and specificity: >10. 9. different antibodies; can distinguish between very similar molecules. Tag particles for clearance/destruction. Protect against re-infection (vaccines). Different . recombinases. have different topological mechanisms:. Xer. . recombinase. on . psi. .. Unique product. Uses topological filter to only perform deletions, not inversions. Ex: . Cre. . Alexei Fedorov. Recombination is an intrinsic property of nucleic acids and these molecules are susceptible to joining their ends. .. Evolution invented thousands of proteins that assist DNA recombination and became crucial for cell functioning. . Drosophila . pseudoobscura. species group. Mohamed A. F. Noor. Duke University. EVOLUTION:. Two fundamental processes. Change within . lineages (adaptation important). Form new lineages . (speciation important). recF recA mutants and related strains. Cultures grown in the surface agar plates RL204;*, RL204/pJL21 protein is not limiting factor. reduced expression the other activities regulated not the same rec Prof Ken . Durose. , . University of Liverpool. Outline – semiconductors and recombination. 1. Band gap representations. 2. Types of semiconductors. -Adamantine semiconductors (Hume -. Rothery. 8-N co-ordination rule. Eukaryotes. . By prof . Sawsan. . Sajid. AL-. Jubori. .  . transcription.  and its regulation in . prokaryotics. is much simpler. But the eukaryotes have to transcribe and then have a process for mRNA processing like capping, splicing and adding ply adenine tail, and then have a special mechanism to transport the processed mature mRNA to the cytoplasm from the nucleus.. E. coliTotal coliformTotal coliform = Environmental contaminationFecal coliformFecal coliform and E. coli = Fecal contaminationE. coli O157:H7 You should test for coliform bacteria at least once a yea Discovery. Genetic linkage was first discovered by the British. . geneticists William Bateson, Edith Rebecca Saunders and Reginald Punnett. . shortly after Mendel's laws were rediscovered. The understanding of genetic linkage was expanded by the work of Thomas Hunt Morgan. . Pairs of allelic genes may exchange chromosomal locations( genetic elements can move, both between chromosomes and within them.) by a process known as genetic recombination.. Homologous recombination . By: Kaitlyn . LeCompte. , Juliana Gracey, & Marc . Danese. Overview. Phototrophs, Chemotrophs, Aerobes, Anaerobes. Binary Fission, Steps of Binary Fission, Genetic Recombination, Bacteria's Resistance to Drugs.