siena248

I mean that since it has a low amount number of copies, losing one plasmid when it is not advantageous will save energy/cost in terms of the cell. I'm not sure if it makes any sense. Thank you!

Hello, I was curious about low, medium, and high copy plasmids and how their copy number affects the rate of evolution. I am learning about antibiotic resistance and we are talking about specifically when there is no selective pressure of antibiotics, how quickly will a bacteria lose the plasmid conferring for antibiotic resistance when it does not have a selective advantage. We are looking at three different types of plasmids, low, medium and high copy number. The reasoning I thought of is that for the low copy plasmid, it will lose the plasmid conferring antibiotic resistance quickly when there is no selective pressure to save energy when making the plasmids. And then I was thinking for the high copy plasmid it would be vice versa, and the medium somewhere in between. Does this make sense? Thank you!

Thank you!! This was very helpful

Hello, I was wondering if someone could help me out with this question. "If the gene for polyphenoloxidase is "old" in evolutionary terms, what do we expect to see when looking at activity in other plant species?" From my limited knowledge on evolution, I want to say that that there would be more variance in the polyphenoloxidase genes in different species due to a longer period of time as well as more random mutations. Does this make sense or does anyone else have a clue at what they are specifically asking? Thank you!!!