You never stated that there was a difference.Not the same thing at all, no bp blood in sb cons as a rule...but yes in sb cons it is a recessive.
The sb gene is dominant, if you cross an sb to a normal bodied fish you'll get 50% normal and 50% sb of varing lengths, good luck!
Some SB's could have BP blood but definitely not all. Oscars, green terrors, rams and mollies are a few that definitely dont have any BP blood. If you inbreed enough you'll get some SB.Bp's are the origin of the sb body type in most if not all hybrids, and I beg to differ, you do indeed get 50% sb fry in the pairing you described, it's just that they vary in length greatly. Some are almost full length, some are extremely short.
If breeding a BP to anything else would produce 50% SB's you'd see more SB texas from all the red texas' attempts.

