The real difference is this: If you say it goes by the whole clutch, it implies that the results may be dependent upon what the other hatchlings are. Each egg has certain odds of being something which is completely independent of the other eggs. So if you've hatched every egg in a clutch and they're all bees, the last egg still has the exact same odds that the other ones did. It's not more likely or less likely to be a bumblebee as well.

Now, the odds of what will pop out will hold true for a large sample size. So, if hypothetically speaking, you bred the same pair ever year and ended up with 100 eggs in total, you should get around 25 normal, 25 pastels, 25 spiders and 25 bees. Ball pythons have such small clutches that you're much more likely to have clutches that vary wildly from the predicted odds.

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