Q: Do you think there will ever be a case of a
fetus in fetu with a functioning brain (to some extent), and if so would it be considered murder to have it removed?
We would call it a conjoined twin, I suspect.
How close are we to being able to manipulate human genetics?
Very close, but it does depend on what sort of manipulation. Researchers are already treating experimental animals with gene therapies, and I think some trials are underway in humans, but I'm not sure any more. We therefore already have some very basic abilities to add genes. We have, as far as I know, no way of removing unwanted genes, such as retroviruses. Any treatment in the foreseeable future that treats such things will induce cells to make proteins that bind to and neutralise viral proteins, adding to the junk functions of the cell rather than taking away junk.
Is that a sufficient answer?
If somebody sings a song at a fundraiser for charity purposes, can the original copyright holder of that said song sue the crap out him?
Repeat question.
Replace "charity purposes" with "school play".
Yes, he can. No, he won't. Negative publicity, cost and effort of the lawsuit and actually finding out about the thing are all against him.
If a performer is really keen not to have his songs performed, he won't even allow the sheet music to be sold. If you can get it arranged for a band, you'll have to find a complete twerp to sue you.