What are the odds that another organism mutates at around the same time/when the first one hasn’t died yet and that that mutation changes the second organism into the exact same species as the first one (changes the same dna bases) AND that those 2 organisms find each other and have sex?
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There’s a bit of a misunderstanding here. No organism mutates into a different species. You can think of species as a snapshot in time of what organisms can reproduce with each other today. You can’t reproduce with a gorilla today, so you’re a different species than the gorilla. But maybe your Great Great Great……Grandfather and the gorilla’s Great Great Great…..Grandmother could have. That is your common ancestor. It’s the many generations that separate us from the gorillas that make us different species. It doesn’t happen over a single generation. So there is no answer to your question because it’s really a false premise.
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