For line Bred Traits :

First an animal is acquired that displays slightly more of a desired trait.....I'm going to use leopard geckos. So say you find a normal male and a mormal female leopard gecko that each have slightly more yellow than other geckos. You then breed the two together. Then you select the offspring that possess the most of the desired trait(more concentration of yellow) and breed them together. As each generation breeds, the offspring will tend to show more and more of the desired phenotype(visual appearance).



Of course, this works best, most efficiently and is considered more ethical to breed multiple breeding pair to increase the gene pool and take less time.



Then you have "Recessive-trait" morphs such as patternless, blizzard(leucisim), and albinism. Selective breeding cannot create recessive traits. These traits are the result of a mutation of certain genes that control a specific part of the development of the animal. Recessive traits are usually discovered randomly, there is nothing you can do to increase your probability of discovering a new recessive trait, you just need to be lucky!
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1.3.0 Leopard Geckos

0.1.0 California Kingsnake

0.1.0 Copperhead

1.1.0 Eastern Box Tutles

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