horizontal gene transfer

Here, in human mitochondrial DNA — note the BLUE code start and the RED code stop; all HT to Wiki publishing against known ideological interest: Complex interwoven code is of course doubly functionally specific, so it is exponentially harder to account for, other than by exceedingly sophisticated and creative intelligently directed configuration. Indeed, when I had to write machine code, I thanked my lucky stars 2114’s and 2716’s were by then affordable RAM and EPROM chips, and proceeded from there. (BTW, a neighbour who was an engineer in an earlier era spoke of how people flew across North America just to see 1 MB of live RAM, in a video memory, a million dollar cost in itself.) We know v Read More ›

Readers will remember science writer David Quammen’s new book, The Tangled Tree:A Radical New History of Life, a biography of Carl Woese, who first identified the Archaea (and doubted Darwinism). They will also doubtless remember Darwinian evolutionary biologist Jerry Coyne, who does not life Tangled Tree, and… Well, he still doesn’t like it and has been holding forth of late: Most of the publicity about the book—to be sure, publicity pushed by Quammen himself—centers on HGT. It is, we’re told, something that radically overturns Darwin’s view of the “tree of life” and of evolution, and even revises our own view of “what it means to be human” (after all, we’re also told, a substantial part of our genome is dead, Read More ›

As we might expect. Darwinian evolutionary biologist Jerry Coyne offers his thoughts on science writer David Quammen’s new book about Carl Woese, The Tangled Tree:A Radical New History of Life: Quammen is right that the horizontal transfer of genetic information does complicate our effort to understand the evolutionary past, but he goes too far in claiming that HGT essentially undermines any and all attempts to reconstruct the evolutionary past: “The tree of life is not a true categorical because the history of life just doesn’t resemble a tree.” Before accepting this radical conclusion, we must answer two questions: How in practice can horizontal genetic transmission occur, and how common is it? … In the end, Quammen provides us with a lucid Read More ›