In his 1859 book, “On the Origin of Species,” the famed scientist hypothesized that artificial selection (or domestication) and natural selection work in the same ways.
Now an international team, led by Northwestern University, has produced some of the first evidence that Darwin’s speculation was correct.
“The evolution of traits is rarely connected to exact genes and processes,” said Northwestern’s Erik Andersen, who led the study. “We offer a clear example of how evolution works.”
-Artificial and natural selection affect the same genes in roundworms.
-In both cases, genes are selected that allow worms to have a sharper sense of smell.
-Worms with a heightened sense of smell can better assess surrounding resources, which plays a crucial role in survival.