KJ6BWB t1_j9iip77 wrote on February 22, 2023 at 5:20 AM

Reply to comment by Marsdreamer in What are more accepted hypotheses that similarly explain the aspects of hominid evolution that the "pseudoscientific" aquatic ape theory does? by KEVLAR60442

> Even deleterious mutations and traits can rise to fixation in a population

To be fair, it requires a lot for a new mutation to spread through a population. For instance polydactylism, or having more than 5 fingers on a hand, is a dominant trait but despite its advantages most of still only have 5 fingers on a hand because it's really hard for a new trait to spread unless it confers a real evolutionary advantage, meaning those who lack it die and most of the survivors have that trait.

asdqwe123qwe123 t1_j9juz61 wrote on February 22, 2023 at 2:21 PM

Dominance also has no effect on how common a trait is, with fitness levels being the same, an allele being dominant doesn't make it more present within a population.