owiseone23
owiseone23 t1_jac139q wrote
Reply to comment by 7LeagueBoots in Why does temperature determine the sex of certain egg laying animals like crocodiles? by insink2300
it's not uncommon for traits to evolve across "fitness valleys". That is, a trait with positive fitness that requires multiple generations to evolve with intermediate generations having negative fitness.
With a large population and a lot of time, random variation makes it possible to evolve across fitness valleys.
owiseone23 t1_jac0yw0 wrote
Reply to comment by platoprime in Why does temperature determine the sex of certain egg laying animals like crocodiles? by insink2300
it's not uncommon for traits to evolve across "fitness valleys". That is, a trait with positive fitness that requires multiple generations to evolve with intermediate generations having negative fitness.
With a large population and a lot of time, random variation makes it possible to evolve across fitness valleys.
owiseone23 t1_jac0w3l wrote
Reply to comment by PatrickKieliszek in Why does temperature determine the sex of certain egg laying animals like crocodiles? by insink2300
That's not quite true. I work on mathematical models of evolutionary processes and it's not uncommon for traits to evolve across "fitness valleys". That is, a trait with positive fitness that requires multiple generations to evolve with intermediate generations having negative fitness.
With a large population and a lot of time, random variation makes it possible to evolve across fitness valleys.
owiseone23 t1_jac29v1 wrote
Reply to comment by aartadventure in Why does temperature determine the sex of certain egg laying animals like crocodiles? by insink2300
it's not uncommon for traits to evolve across "fitness valleys". That is, a trait with positive fitness that requires multiple generations to evolve with intermediate generations having negative fitness.
With a large population and a lot of time, random variation makes it possible to evolve across fitness valleys.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2711507/