Problem is terminology. Does "champagne to champagne" refer to all the offspring from a champagne mated to a champagne? Or does it mean a snake with two champagne genes in its gene pair? The difference can be confusing.
Mating a champagne to a champagne is expected to produce
1/4 babies with two champagne genes (super champagne -- die)
2/4 babies with a champagne gene paired with a normal gene (champagne)
1/4 babies with two normal genes (normal)
The above mating shows that only the super champagne babies die. The others are fine.
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