The molecular mechanism of SCE is similar to homologousrecombination between homologs except that the two segmentsof DNA are sister chromatids instead of homologous chromatids.If branch migration occurs during SCE, will a heteroduplex beformed? Explain why or why not. Can gene conversion occurduring sister chromatid exchange?
Genetic Recombination
Recombination is crucial to this process because it allows genes to be reassorted into diverse combinations. Genetic recombination is the process of combining genetic components from two different origins into a single unit. In prokaryotes, genetic recombination takes place by the unilateral transfer of deoxyribonucleic acid. It includes transduction, transformation, and conjugation. The genetic exchange occurring between homologous deoxyribonucleic acid sequences (DNA) from two different sources is termed general recombination. For this to happen, an identical sequence of the two recombining molecules is required. The process of genetic exchange which occurs in eukaryotes during sexual reproduction such as meiosis is an example of this type of genetic recombination.
Microbial Genetics
Genes are the functional units of heredity. They transfer characteristic information from parents to the offspring.
The molecular mechanism of SCE is similar to homologous
recombination between homologs except that the two segments
of DNA are sister chromatids instead of homologous chromatids.
If branch migration occurs during SCE, will a heteroduplex be
formed? Explain why or why not. Can gene conversion occur
during sister chromatid exchange?
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