to each individual egg as far as the odds go, not the clutch.
Breeding a homozygous recessive (albino, piebald, hypo, axanthic, clown, etc) to a normal or a different morphs will produce all hets for the trait.
Breeding a homozygous recessive to a heterozygous individual will produce eggs with an equal chance of being homozygous recessive or heterozygous. This is where people say that in theory you should get half albinos and half hets.
Breeding 2 heterozygous animals will produce eggs with a 25% chance of being homozygous recessive, a 50% chance of being heterozygous, and a 25% chance of being homozygous dominant(normal). That's where you get your 66% possible hets.
Breeding a heterozygous snake to a homozygous dominant(normal) will produce eggs with a 50% chance of being heterozygous and a 50% chance of being homozygous dominant(normal). This is where you get your 50%.
I'm not going to get into the 25% business but if you ask me, odds wise, they do exist. They just wouldn't be worth anything more than a normal.
Hope this helps more than it confuses, I just wanted to clear up the idea that a het to het breeding will produce a homo recessive, as you could get a 7 egg clutch and no albinos.
Cole Maas