Darwin found this pattern of replacement-within-replacement with the mockingbirds.
That Darwin was actually looking for this double pattern of replacement that he found in the mockingbirds and soon after learned of in the tortoises is perhaps even more graphically confirmed by what Darwin, famously, did not see in the Galapagos: any pattern of inter-island replacement by "varieties or species" of the Galapagos finches.
We analyzed the pattern of replacement and synonymous polymorphism and divergence with the generalized version of the MK.
We did not recover such a pattern of replacement in our data, which includes more lepidopteran fossil specimens than those used by Kozlov et al. [ 11].
Previous statistical analysis has shown that the observed pattern of replacement mutations in the CDRs of these sequences is consistent with antigen-driven selection [ 32, 33, 35, 38- 40].
25, 26 In this study, a standard patient dose was chosen as we needed proof of concept that it is possible to replicate a physiological pattern of replacement and safety had to be of foremost importance.
It is remarkable that a very similar pattern of replacement of fGIs has been found in 113 genomes of V. cholera (Mutreja et al. 2011) in which also within a background of very little core variation there was a replacement of the O-chain polysaccharide gene cluster and the giant protein gene described before.
For perinatal ETS, two archetypal patterns were seen in the various regions, one characterized by cell loss (reduced DNA concentration) and corresponding increases in cell size (increased protein/DNA ratio), and a second pattern suggesting replacement of larger neuronal cells with smaller and more numerous glia (increased DNA concentration, decreased protein/DNA ratio).
This pallial pattern of replacement GPT neurons presented a second paradox because, compared with E14 control mice, the average measured density of GPT neurons/mm of pallium was only 17% greater, and the total complement of pallial GPT neurons was 57% less, in E14 ablated mice.
In particular, why did Darwin focus on patterns of replacement of closely related species in time?
