For decades, many evolutionary biologists have believed that most genetic changes shaping genes and proteins are neutral. Under this view, mutations are usually neither helpful nor harmful, allowing … [+6184 chars]
Scientists say evolution works differently than we thought - ScienceDaily
A major evolutionary theory says most genetic changes don’t really matter, but new evidence suggests that’s not true. Researchers found that helpful mutations happen surprisingly often. The twist is that changing environments prevent these mutations from spre…
Source:Science Daily
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