Why some animals occasionally sprout limbs from their ancestors
In short: Biological history isn't always erased by evolution. This video explores atavisms—the reappearance of ancient physical traits in modern species—and how these genetic echoes provide a window into the mechanics of growth and evolutionary history.
Atavisms occur when traits that were present in an ancestral species reappear in a new generation hundreds of years later. These genetic echoes offer scientists a unique opportunity to study the fundamental processes of biology, such as the specific mechanisms of how limbs develop.
By observing these reappearing traits, researchers can better understand the underlying blueprints of evolution and the way genetic information is preserved or reactivated over vast periods of time.
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Sources
- Summary by Intellect · source: Ancient Genetics that Still Occur Today: Atavisms Explained
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