Problem:
"Males do not show meiotic recombination, facilitating genetic studies."
For a while I have known that this phenomenon occurs, this quote comes from the Wikipedia page on Drosophila melanogaster, and I frequently use this feature of Drosophila in constructing hemiclones for my own research in quantitative genetics.
Required:
Question 1: Why doesn't recombination happen?
Question 2: Why would this feature evolve?
Question 3: Why is the absence of recombination sex-limited to males, why do females have recombination?
Explain all the answers in detail.