——advantageous gene appears and quickly spreads through the population. ——
The gene doesn’t spread through the population. The population with the gene grows because it is favorable and is transmitted widely over time
It is a gene, not a virus
Uncertainty is the mark of a keen mind
Thanks bert.
8 percent of human genes come from virus
http://www.topnews.in/8-percent-human-genes-come-virus-2250962