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A comment on New finding: 600M years ago, a single mutation changed everything. Parent comment
Genetic linkage is a fairly advanced concept. For example, this (great) introductory Yale course doesn't even mention it. http://oyc.yale.edu/ecology-and-evolutionary-biology/eeb-122...
Every gene is next to another gene. You are right, the scenario you are detailing is unlikely - correspondingly, it happens very rarely.
Complex things we don't understand often seem magical.
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Genetic linkage is a fairly advanced concept. For example, this (great) introductory Yale course doesn't even mention it. http://oyc.yale.edu/ecology-and-evolutionary-biology/eeb-122...
Every gene is next to another gene. You are right, the scenario you are detailing is unlikely - correspondingly, it happens very rarely.
Complex things we don't understand often seem magical.