Here we go:
Males get larger than females due to their combatting over territories and females in the wild. This has a selection pressure for larger males than females. There may be cases though where females will get larger. I have male and female coastals, and at current, my females are larger than the male for what it's worth.
Jaguar is a Co-dom morph, with the super form being a lucy that is not viable outside of the egg. So breeding 2 Jaguar together can produce a super all white blue eyed snake, but in all cases, it dies during development, or just before it comes out of the egg.
Most of the jaguars are hatched as either red or brown in coloration. It's VERY hard to judge how bright the adult will be, but you can guess by the cleanliness of the pattern. The less dark markings it has as a young snake, the less it will have as an adult and the brighter it will typically be. So go for super clean, ask to see parents when plausable. They don't brown out, coastal morphs just get better with age.
Tiger is a polygenic trait. The gene itself is dominate and passed on with simple inheritance. Right now, we are unsure if there are 1,2, or even 3 genes that control the Tiger trait, but we do believe it to be a polygenic trait that will becomes more reduced as more genes get involved. Each parent is still believed to only transfer 1 possible copy of the gene max, and even tigers can produce normal looking coastals. It's a weird trait, but just consider it again to be Polygenic. - Line breeding simply allows more copies of the gene to be brought into the offspring producing more appealing offspring with a greater amount of reduction in dark pigments and patterns.
Breeders I can rec right now are Justin Julander and Nick Mutton. Justins at www.australianaddictions.com and nick www.inlandreptile.com
If you are getting it just to have as a sweet pet, get a Caramel Jag. The caramel gene is not attractive in young snakes, but fires up with age!
Cheers
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