I love the broad genre of rock and roll music.
I love rock music as well! If I recall wasn't rock made out of blues scales or something?
Yes, it's influenced heavily by blues and country music.
That makes since do you know where rock originated? 
It started in the US during the 1950's and now has multiple sub genres.
What are some of the sub genres? I think punk and grunge are some right?
Correct, other sub genres include blues rock, folk rock, raga rock, and jazz-rock.
That is really cool. And we got all that great music because some guy god the blues one day.