tag:blogger.com,1999:blog-6821840758756075048.post2135756586474955833..comments2023-09-25T09:44:38.184-07:00Comments on Evolutionary Novelties: Eyes aboundUnknownnoreply@blogger.comBlogger7125tag:blogger.com,1999:blog-6821840758756075048.post-68475029534482284132009-07-30T06:40:26.883-07:002009-07-30T06:40:26.883-07:00zayzayem - Of course all animal cells share some h...zayzayem - Of course all animal cells share some homologous features. However, what I described goes far beyond that.<br /><br />Bob - Interesting thought you have ( and an easily testable hypothesis) about butterfly eyespots. Butterflies do have photoreceptors in strange places, like on their genitalia.Todd Oakleyhttps://www.blogger.com/profile/14309149952900395185noreply@blogger.comtag:blogger.com,1999:blog-6821840758756075048.post-1632500134529352682009-07-29T12:23:51.817-07:002009-07-29T12:23:51.817-07:00Hi Todd,
Could this imply that some "eyespots...Hi Todd,<br />Could this imply that some "eyespots" in moths, fish etc actually could have sensory capability? The evidence for their anti-predator function seems weak.<br />Bob MillerBob Millerhttps://www.blogger.com/profile/05765251661194437145noreply@blogger.comtag:blogger.com,1999:blog-6821840758756075048.post-56576106204456921852009-06-24T22:23:23.314-07:002009-06-24T22:23:23.314-07:00Aren't eyes and feathers both made of bird cel...Aren't eyes and feathers both made of bird cells containing bird DNA?<br /><br />Of course they are going to have some similar features suggesting a shared origin.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6821840758756075048.post-46300432148920083212009-06-20T16:02:36.047-07:002009-06-20T16:02:36.047-07:00gillt "Oh, I assumed your example of dolphins...gillt "Oh, I assumed your example of dolphins and fish sharing fins was relevant here."<br /><br />Dolphin and fish fins would be a case of convergence, or homoplasy (perhaps that is what you meant in your original comment instead of orthology).<br /><br />But the point is that even convergent traits can have some elements of homology. For example, the bones of dolphin fins and a few fish (lobe fin fish) are homologous, even though we consider the overall structure and function of the fins to be convergent in those 2 taxa (lobe fins and dol-fins).Todd Oakleyhttps://www.blogger.com/profile/14309149952900395185noreply@blogger.comtag:blogger.com,1999:blog-6821840758756075048.post-91145157345550102042009-06-19T11:21:26.050-07:002009-06-19T11:21:26.050-07:00Oh, I assumed your example of dolphins and fish sh...Oh, I assumed your example of dolphins and fish sharing fins was relevant here.gilltnoreply@blogger.comtag:blogger.com,1999:blog-6821840758756075048.post-49770860940933952092009-06-19T09:13:48.521-07:002009-06-19T09:13:48.521-07:00gillt - no, I don't think I mean orthology per...gillt - no, I don't think I mean orthology per se, when discussing cross-species similarities, although I wouldn't rule it out. Paralogy could also be a very useful word here. I used homology as a word to include either orthology or paralogy and was not explicitly referring to any one level (geno or phenotype).Todd Oakleyhttps://www.blogger.com/profile/14309149952900395185noreply@blogger.comtag:blogger.com,1999:blog-6821840758756075048.post-82124702902645055292009-06-19T07:37:37.878-07:002009-06-19T07:37:37.878-07:00Don't you mean orthology, not homology, when d...Don't you mean orthology, not homology, when discussing cross-species similarities, be it geno or phenotype?gilltnoreply@blogger.com