body~politic

Monday, October 17, 2016

Convergent evolution - Wikipedia

Convergent evolution - Wikipedia



Re-evolution vs. convergent evolution[edit]

In some cases, it is difficult to tell whether a trait has been lost then re-evolved convergently, or whether a gene has simply been 'switched off' and then re-enabled later. Such a re-emerged trait is called an atavism. From a mathematical standpoint, an unused gene (selectively neutral) has a steadily decreasing probability of retaining potential functionality over time. The time scale of this process varies greatly in different phylogenies; in mammals and birds, there is a reasonable probability of remaining in the genome in a potentially functional state for around 6 million years.[11]


Twitter

-view CSL mobile version -



Webring Translator Thingamajig