Originally Posted by: froggy62If I am playing a casual blues jam and they say the song is in 1 4 5 does this mean that I can use the 1 4 5 cvhord theory with the pentatonic minor scales ???

Yes, or pentatonic major. Or you can mix pentatonic scales with chord tones for the best blues sound. :) I explain this in depth in a bunch of tutorials.

http://www.guitartricks.com/tutorial.php?input=217
http://www.guitartricks.com/tutorial.php?input=232
http://www.guitartricks.com/tutorial.php?input=826
http://www.guitartricks.com/tutorial.php?input=244