If a gene isn’t being expressed, there’s no way to weed out deleterious mutations. The “keep it around for later” thing might work on short time scales, but on longer time scales genes that aren’t being expressed will degrade into gibberish.
Relevant to this point:
http://www.nature.com/nature/journal/v485/n7396/full/nature10995.html
If a gene isn’t being expressed, there’s no way to weed out deleterious mutations. The “keep it around for later” thing might work on short time scales, but on longer time scales genes that aren’t being expressed will degrade into gibberish.
Relevant to this point:
http://www.nature.com/nature/journal/v485/n7396/full/nature10995.html