IMHO. You first must take a pair of snakes with the desired traits for the snake you wish to produce. Say you want to produce a lavender stripe. You would breed a lavender to a normal stripe. The F2 would be normal het lavender het stripe. The f2 when breed together would produce in the F3 generation. Normals, lavenders, stripes, and lavender stripes, with possible het for stripe and lavender.
The odds are not good 1/16 for producing a double recessive snake and 1/64 for a triple recessive trait. This is where the cost comes into the picture. It can take years and lots of genetic grab bag snake to produce the desired morph.
These grab bag snakes usually have to be let go cheap, because most breeders do not want snakes that are possible het anything. So a breed takes a female that can make morphs that are say $100 an uses her to produce tons of snakes that are worth $20. This is why the triple and double recessive are expensive.
For the hobbist though, these grab bag snakes are great, because when breed together they will make numerious morphs. It's like christmas when the eggs hatch, you never know what you will get.
TOM
xtremeherps@yahoo.com