U n study published in Nature Genetics corroborates genetically unique character of evolution. The idea was to recreate the natural selection live in a lab fruit fly (Drosophila melanogaster ) which is possible due to the short life span they have.
D uring two decades, his descendants grew in the laboratory under different environmental stress stimuli and then be returned to their ancestral environment. Along 50 generations of flies, the researchers looked at whether evolutionary process could be "reversed" to return to their ancestral habitat.
P ara this, the scientists examined the chromosome 3. Indeed, the flies showed regressive changes to his sources, but only to a point where this "reversible evolution" seems to stop when fly populations are adapted to the ancestral environment. At the genetic level, the convergence to the ancestral state is 50%.
L you results suggest that the evolution of alleles at more "repeatable" that evolution resulting from gene mutations (remember that they occur by chance).
Source: Nature
D uring two decades, his descendants grew in the laboratory under different environmental stress stimuli and then be returned to their ancestral environment. Along 50 generations of flies, the researchers looked at whether evolutionary process could be "reversed" to return to their ancestral habitat.
P ara this, the scientists examined the chromosome 3. Indeed, the flies showed regressive changes to his sources, but only to a point where this "reversible evolution" seems to stop when fly populations are adapted to the ancestral environment. At the genetic level, the convergence to the ancestral state is 50%.
L you results suggest that the evolution of alleles at more "repeatable" that evolution resulting from gene mutations (remember that they occur by chance).
Source: Nature
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