SFS stated: “if you're trying to understand the natural world -- trying to do biology, in other words -- then yes, you do indeed need to explain the patterns in genetic similarity.”
"As ever more multicellular genomes are sequenced, ever more incongruous bits of DNA are turning up. Last year, for example, a team at the University of Texas at Arlington found a peculiar chunk of DNA in the genomes of eight animals – the mouse, rat, bushbaby, little brown bat, tenrec, opossum, anole lizard and African clawed frog – but not in 25 others, including humans, elephants, chickens and fish. This patchy distribution suggests that the sequence must have entered each genome independently by horizontal transfer… [Michael] Rose goes even further. “The tree of life is being politely buried, we all know that,” he says. “What’s less accepted is that our whole fundamental view of biology needs to change.” Biology is vastly more complex than we thought, he says, and facing up to this complexity will be as scary as the conceptual upheavals physicists had to take on board in the early 20th century. Syvanen recently compared 2000 genes that are common to humans, frogs, sea squirts, sea urchins, fruit flies and nematodes. In theory, he should have been able to use the gene sequences to construct an evolutionary tree showing the relationships between the six animals. He failed. The problem was that different genes told contradictory evolutionary stories. ‘Roughly 50 per cent of its genes have [suggest] one evolutionary history and 50 per cent another,’ Syvanen says. “We’ve just annihilated the tree of life. It’s not a tree any more, it’s a different topology entirely”
Source: godandscience.org/evolution/science_human_origins.html
"As ever more multicellular genomes are sequenced, ever more incongruous bits of DNA are turning up. Last year, for example, a team at the University of Texas at Arlington found a peculiar chunk of DNA in the genomes of eight animals – the mouse, rat, bushbaby, little brown bat, tenrec, opossum, anole lizard and African clawed frog – but not in 25 others, including humans, elephants, chickens and fish. This patchy distribution suggests that the sequence must have entered each genome independently by horizontal transfer… [Michael] Rose goes even further. “The tree of life is being politely buried, we all know that,” he says. “What’s less accepted is that our whole fundamental view of biology needs to change.” Biology is vastly more complex than we thought, he says, and facing up to this complexity will be as scary as the conceptual upheavals physicists had to take on board in the early 20th century. Syvanen recently compared 2000 genes that are common to humans, frogs, sea squirts, sea urchins, fruit flies and nematodes. In theory, he should have been able to use the gene sequences to construct an evolutionary tree showing the relationships between the six animals. He failed. The problem was that different genes told contradictory evolutionary stories. ‘Roughly 50 per cent of its genes have [suggest] one evolutionary history and 50 per cent another,’ Syvanen says. “We’ve just annihilated the tree of life. It’s not a tree any more, it’s a different topology entirely”
Source: godandscience.org/evolution/science_human_origins.html
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