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Title: Genetics of bacteria and their viruses Post by: XwakeriderX on Apr 9, 2011 Before recombination can occur in bacteria, a fragment of DNA must be taken into the cell. Why cannot bacteria undergo recombination without the addition of "foreign" DNA?
Book: Introduction to genetic analysis 9th griffiths Class: Molecular cell biology & Genetics Any kind of help would be awesome! Thanks Title: Re: Genetics of bacteria and their viruses Post by: XwakeriderX on Apr 9, 2011 Ah I clicked on the wrong forum link. Oh well
Title: Re: Genetics of bacteria and their viruses Post by: bio_man on Apr 9, 2011 Genetic recombination refers to the exchange of nucleotide sequences between two DNA molecules often mediated by segments that are composed of identical or nearly identical nucleotide sequences called homologous sequences. DNA molecules that contain new arrangements of nucleotide sequences are called recombinants. Since bacteria only have one chromosome, you need a second piece of DNA for crossing-over to take place in that bacterium. Without this foreign piece of DNA, there won't be any crossing-over. Think of homologous chromosomes in meiosis in eukaryotic cells and you'll get a good picture of what's happening.
Title: Re: Genetics of bacteria and their viruses Post by: bio_man on Apr 9, 2011 Tell me if you still don't get it; if not, mark it as solved :)
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