BIO 282 Lecture 13: Lecture 13
Document Summary
Things that you can see: pre-zygotic (you cannot reproduce with that individual based on how you assess them based on looks) What mechanisms isolate species: two species hybridize but the offspring die early during embryonic development. A more efficient way than so prevent hybridization would be to have incompatible genitals. Allopatry-groups do not occur in the same place. Selection for the extreme traits and can figure out there mates (assortative mating) Organisms in the middle will have unfit traits and lower fitness. Ex: beak size and call sounds are associated to each other so that birds can tell if a bird has a small or large beak. Sympatric speciation occurs when alleles under disruptive selection are on the same chromosome as alleles for assortative mating: mutation, sympatric speciation likely accounts for the majority of species on earth. False: what are the odds of a mutation coming along, this doesn"t happen very often.
