Evolution

Those of us who have been involved with the discussion and debate surrounding ID/evolution for any significant length of time will be quite aquainted with the most fashionable neo-Darwinian model for the origin of novel biological information: Gene duplication and divergence. Gene duplications normally arise from a phenomenon known as “unequal cross-over”, which occurs during cell division. This process results in the deletion of a sequence in one strand, and its replacement with a duplication from its homologous chromosome (meiosis) or its sister chromatid (mitosis). The model of gene duplication and divergence essentially maintains that, following a gene duplication, while one copy of the gene retains its original function, the other copy is freed from selective constraint and is thus Read More ›