ANTA01H3 Lecture Notes - Lecture 2: Karyotype, Francis Crick, Gregor Mendel
Document Summary
Natural selection"s explanation of the giraffe"s long neck (which is probably right) The giraffe population has variation naturally, as there is in any population (in forms of longer neck giraffes & shorter neck giraffes) Longer neck giraffes better adapted in situations in which its advantageous to get food at the top of trees (ex. Climate change occurs, food gets dry, food is scarce. Only longer neck giraffes will get enough food in order to live will lead to only long neck giraffes to live & reproduce move the entire population in the direction of longer neck giraffes) Natural selections (no intelligence doing the selection, it"s a product of reproduction & survival) Artificial selection (the intelligence doing the selection is us ex. Sexual selection (mentioned in darwin"s book the decent of man, features that are associated with the process of mating, eg. peacocks tails: (non-random mating, e. g. , inbreeding) (cid:2) (cid:2) (cid:2) Sexual selection: selection on feature or behaviours associated with mating.
