Biology 1001A Lecture Notes - Lecture 5: Replica Plating, Pilus, Chromosome
23 Mar 2014
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Q- what would happen if two circular dna molecules were involved in a. A-two circular molecules fuse" together as a result of a single. Rare mutations in a dna sequence of a gene give rise to new alleles. Without this phenomenon there would be no evolution! 10. 2- genetic recombination in bacteria: data showed that, for particular bacteria, there are mechanisms to bring dna from different cells together to recombine and create genetically different offspring, study of bacterial recombination requires detectable genetic differences between strains. Dna of the bacterial chromosome may recombine with dna brought into close proximity from another cell: three primary mechanisms bring. Dna into bacterial cells from the outside: conjugation, transformation, and transduction: conjugation-the basis of a kind of sexual reproduction in bacteria. Contact each other by a long tubular structure called a sex pilus and then form a cytoplasmic bridge. Part or all of the dna of one cell moves into the other through the bridge.
