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Annotated Bibliography

Decent Essays

Shivani Patel
BIO 398: Half-Credit Independent Research
Annotated Bibliography

1. Seaton, S.C., Elliott, K.T., Cuff, L.E., Laniohan, N.S., Patel, P.R., and Neidle, E.L. 2012. "Genome‐wide selection for increased copy number in Acinetobacter baylyi ADP1: locus and context‐dependent variation in gene amplification." Molecular microbiology. 83(3): 520-535.

Gene duplication and amplification is a process by which variation can be created and selected for. By understanding gene duplication and amplification, scientists can glean insight on medical conditions dealing with this genetic phenomenon. In this study, scientists use Acinetobacter baylyi to understand the effects of gene duplication and amplification and the position of the amplified …show more content…

Instead, they argued in favor of the recombination dependent mutation theory. E.coli with a Lac- mutation were found to revert back into Lac+ bacteria when grown in lactose and minimal media. However, the mechanism was still unclear. Some scientists argued the lac region still had some ability to catalyze lactose, and will be amplified until it can grow on lactose. On the other hand, scientist at Indiana University state revertants are created through DNA error. Through three experiments, scientist argued against the amplification dependent mutation theory. Transposons were inserted at various distances from the lac region, and transformation frequency did not decrease as the transposon and lac distance decreased. Amplification of the transposon and the lac region should have occurred at the same frequency because they are close together on the plasmid. Furthermore, tetA gene, another gene on the plasmid, was also selected in the experiment. Similarly, the reversion of this gene was not tied to the reversion of the Lac- no matter the distance. Lastly, the amplification theory states alleles must be cis to undergo amplification. However, scientists found that reversion still occurs when the lac region is trans. Thus, these scientists debunk the amplification dependent mutation theory in favor of the recombination dependent mutation

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