Mutts aren't guaranteed to live longer, it's all about which genes were dominant.
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Mutts aren't guaranteed to live longer, it's all about which genes were dominant. Healthy Genetics aren't guaranteed to overwrite unhealthy ones and they're also not immune to being overwritten, and all of the dog breeds genetics would overlap such that the more recent breeds in the list would be very pronounced and the most distant would be barely noticeable if any traits remained.