Good answer!
I think your question is interesting (and a 1/2 question for once!) but it's unanswerable. I think you're implying that flies with curly wings absolutely can't breed. If that were the case, it would take one generation for the trait to disappear.
It's actually not the case though; lots of Drosophila have curly wings (so many that I've actually seen it myself! .
Describe the mechanism by which Relenza (zanamivir) slows the spread of influenza through a population [4 marks]
I want you to describe the molecular basis but also reflect on why we prescribe this drug in bulk in flu season
Just looking through the Bio forum and found this gem. Let's see if we can bring it back to life!
EDIT: this revival attempt probably would have been more successful about a week ago. I think most people are exhausted from bio, however I have a unabating addiction to answering bio questions (regardless of my poor skills) and need an outlet.
Relenza is a rationally designed drug with a specific conformation and charge complementary to the active site of enzyme neuraminidase on the influenza virus which functions to cleave the connection (docking protein) between a virus and host cell in the replication cycle of influenza. As such, Relenza will bind to the active site of neuraminidase and cause inhibition of its function to cleave the virus-host cell connection and thus prevent the completion of the virus replication cycle. This reduces the spread of influenza within the host organism treated with Relenza and will enable the immune system to more effectively deal with the infection. Since Relenza functions to block the active site of neuraminidase, it is thus a competitive inhibitor and as such its efficacy in preventing virus spread is improved when in greater concentration in allowing out-competition for the neuraminidase active site. Bulk use of Relenza would also not carry with it the same ethical concerns over production of resistant influenza as neuraminidase is highly conserved and unchanging (at least that is what I gather but may be wrong).
EDIT: I tried editing my answer to make it less horrendous, but alas I think I will not satisfy the 4 marks
My question:
Explain why mtDNA is commonly used over DNA for molecular clock analysis and determining evolutionary relatedness