actually, technically, the offspring snake could have gotten a "bad" allele from either parent. This means that there is an equal chance of a snake that is het for the defect crossing with a snake that is completely wild-type for that gene (no defective offspring) or a het crossing with another het (1/4 defective) the final result is that if we're assuming that this theoretical harmful mutation is independent of the trait actually being bred for (not "linked" on the same chromosome) then the numbers work out identically for a sib/sib cross as they do for an offspring/parent cross. A given baby snake shares 50% of its genes with either parent and 50% of its genes with a full sibling (same mother and father) Sorry for the long-winded post, I kinda got carried away.
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1.1 Red Bloods (Cartman and Bebe)
0.1 Boa Constrictor (Victoria)
0.1 Albino Burm (Butters)
0.0.1 Desert King (Miles)

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