4 ms·

This is extremely silly. Genes that act in larval, pupal, and adult development are all mixed up together in the same chromosomes; there's no plausible way for

This is extremely silly. Genes that act in larval, pupal, and adult development are all mixed up together in the same chromosomes; there's no plausible way for them to have integrated in the manner suggested. Moreover, the same genes and used and reused again and again in different contexts in insect development. Again, this is absurdly unlikely under the scenario he proposes.

robbiep 14y ago
I agree that it is extremely silly, however what you suggest about the genes being all mixed up in the same chromosomes as disproving it I don't buy.. I'm not sure if you've ever seen chromosome maps showing gene locations on chromosomes between different species but this is instructive in this matter: between species and thus, as numbers of chromosomes flux up and downwards, the genes which may have started in one chromosome end up spread throughout many- I am sure you will find the following links interesting Background: on chromosome rearrangement: http://scienceblogs.com/pharyngula/2008/04/21/basics-how-can-chromosome-numb/ http://scienceblogs.com/pharyngula/2008/04/21/basics-how-can... Synteny map - cool explination http://scienceblogs.com/pharyngula/2006/06/08/pufferfish-and-ancestral-genom/ http://scienceblogs.com/pharyngula/2006/06/08/pufferfish-and... mouse human synteny map http://www.mun.ca/biology/scarr/MGA2-11-33smc.html http://www.mun.ca/biology/scarr/MGA2-11-33smc.html
- jamesjporter 14y ago
  Yes, to some extent genes are mobile and do get shuffled around, but if this hypothesis were true, it would be obvious. Whole genomes don't just merge on the time scales we're talking here. If this hypothesis were true, there would be clear genomic anomalies indicating it (e.g. biases of genes used at the same developmental stage tending to cluster in similar genomic regions); no such anomalies have been found.

robbiep 14y ago

I agree that it is extremely silly, however what you suggest about the genes being all mixed up in the same chromosomes as disproving it I don't buy.. I'm not sure if you've ever seen chromosome maps showing gene locations on chromosomes between different species but this is instructive in this matter: between species and thus, as numbers of chromosomes flux up and downwards, the genes which may have started in one chromosome end up spread throughout many- I am sure you will find the following links interesting Background: on chromosome rearrangement: http://scienceblogs.com/pharyngula/2008/04/21/basics-how-can-chromosome-numb/ http://scienceblogs.com/pharyngula/2008/04/21/basics-how-can... Synteny map - cool explination http://scienceblogs.com/pharyngula/2006/06/08/pufferfish-and-ancestral-genom/ http://scienceblogs.com/pharyngula/2006/06/08/pufferfish-and... mouse human synteny map http://www.mun.ca/biology/scarr/MGA2-11-33smc.html http://www.mun.ca/biology/scarr/MGA2-11-33smc.html

jamesjporter 14y ago
Yes, to some extent genes are mobile and do get shuffled around, but if this hypothesis were true, it would be obvious. Whole genomes don't just merge on the time scales we're talking here. If this hypothesis were true, there would be clear genomic anomalies indicating it (e.g. biases of genes used at the same developmental stage tending to cluster in similar genomic regions); no such anomalies have been found.