Microbial Genetics Mutations Genetic Recombination in Bacteria Introduction,Pisum Sativum,Prokaryotic Microorganisms

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Microbial Genetics Mutations Genetic Recombination in Bacteria Microbial Genetics Mutations Genetic Recombination in Bacteria - Introduction Mutations Change in the Phenotype always due to Mutation Spontaneous Mutations Induced Mutations The Expression of Mutations Types of Microbial Mutants Practical Implications of Microbial Mutants Isolation of Microbial Mutants Direct Observation Enrichment Technique Replica-Plating Technique Genetic Recombination in Bacteria Conjugation Conjugation between a F ⁺ (donor) cell and F ^-(recipient)cell Conjugation between Hfr Donor Cells and Recipient (F^-)Cell

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Microbial Genetics (Mutations, Genetic Recombination in Bacteria, Genetics of Lysogenization, Neurospora Genetics, and Fungal Parasexuality)
We all know that the genetics is the science of heredity (inheritance) and variations (variability) of the characteristics of an organism. Its origin can be traced only a little more than 140 years back when Gregor John Mendel (1822-1884), appropriately called the Father of Genetics, published his results of experiments with garden pea (Pisum sativum) in 1865. In the beginning, however, it was never believed that prokaryotic microorganisms being so minute and lacking complex structures could contribute any to the science of genetics.

But, it was not long before viruses, bacteria and microfungi became important objects of genetic research and, indeed, they came to be recognised as principal experimental tools for unravelling the fundamental knowledge at the molecular level.

The distinct advantages in using microorganisms for genetic researches are: (i) their small size and fast rate of growth. Microbial cultures often contain mi11ions of individual cells and some can duplicate only within 20 minutes of time at optimal conditions, (ii) the ease with which large populations can be handled, (iii) simple growth media requirements, and (iv) the simplicity of their genetic material.

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Conjugation between F (F-prime)Male and F ^-(Recipient)Cell (Sex-Duction) How Avirulent (nonpathogenic) Strains Transform into Virulent (pathogenic) Strains Transformation Transduction Why not all Virulent Phages bring Generalized Transduction Generalized Transduction Bacterial DNA during Generalized Transduction Specialized Transduction Abortive Generalized Transduction Genetics of Lysogenization Neurospora Genetics Fungal Parasexuality Formation of Heterokaryotic Mycelium Karyogamy and Multiplication of Diploid and Haploid Nuclei Side by Side Mitotic Crossing-Over During the Multiplication of Heterozygous Diploid Nuclei Sorting Out of Diploid Nuclei Haploidization Sorting Out of New Haploid Nuclei