Can an slr nikon lens fit on a canon eos dslr body?

It looks the same, I have a nikon fg and I want a canon eos 1100d1 Please help thanks

Of course not

if you want to make use of the lenses you have on your Nikon FG, best would be to return the 1100D and get a Nikon DSLR

No, but the lenses you have will fit (without AF) on a Nikon D3100.

Why jump from Nikon to Canon?

Especially since right now, when you compare Nikon sensors to Canon's, Nikon clearly have the best performance.

http://www.dxomark.com/...or-Ratings

Just put a check mark next to Canon and Nikon and look at the sensor ratings.

You can, with an adaptor, but you'll lose AF and have to use stop-down metering.
http://www.amazon.com/...B001G4QXLE

As for Nikon sensors being better than Canon, I'd check:
1. Who makes Nikon sensors?
2. What does DXO say about Sony/Nikon cooking RAW… Http://www.dxomark.com/index.php/Publications/DxOMark-Insights/Half-cooked-RAW… But the question wasn't which brand was better.