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The conditions are our DNA, genetic code, and how 'it' operates. It is why I've always had trouble with macro evolution.
Evolution is explained, generally, as mutations that occur over time evolving a species....that works within a species as a depletion of genetic code, not an addition.
Mutations within DNA are a 'weaker code' (thankfully) and not dominant....for species change to take place the mutation would have to be dominant to 'build' and not devolve.
Natural selection reduces mutation within the same species....like the wild horse herd in Nevada that is so interbred many horses are born blind...a mutation that lead to a loss of DNA building blocks...if a healthy herd were introduced natural selection would 'fix' the mutation in some generations...the healthy DNA would not be overcome it would dominate....so how did mutaion lead to a new species.
The DNA barrier code is also a problem...a mutation will not pass the barrier code to reproduce once removed....Beefalo, close but not exactly the DNA, mate and have an offspring that is incapable of reproduction...the barrier code.
My question then is, how does a mutation build or add huge elements of new DNA over riding natural selection and the DNA barrier code.
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