Barbara McClintock Was Right
Back in 2003, I proposed that genomes were designed to be modular and mutable and that this was the probable explanation for the rapid species diversification immediately after the Flood. I also suggested that these genomic changes were the direct result of environmental stress. Barbara McClintock thought something similar about speciation and genomes. She called the genome a "highly sensitive organ" that can respond to new conditions by rearranging itself. In 2003, I had a few examples of eukaryotic retrotransposons that mobilized during periods of stress, but I knew of no examples of any rearrangements that could be linked to a useful phenotype. The best examples of genomic modularity that I could give at the time were genomic islands. These are regions of bacterial genomes that are identifiable by a GC content or codon preference different from the rest of the chromosome where the island is found. They are often bounded by repeat sequences, and most importantly, they conta