BlueShiftRhino wrote:Wow. PZ really is a disingenuous little shitbird.
At his talk at Skepticon 7, he does some math (around the 16-minute point), to show that the expected number of TTAGGG motifs on Chr2 by chance should be about 58,000. Then he says that we've found about 45,000 of these motifs, so there's nothing to see here; it's all just chance and creationists don't know probability.
Pretty good show if that's all you watch or your memory only extends back about 2 minutes. But scroll the video back to 13:20 and you'll see - according to PZ, at least - that the TTAGGG motif was actually found more than 500,000 times, i.e., about 10 times the rate predicted by chance. Given the huge N we have here, this would be off-the-scale significant if you did any inferential stats, supporting exactly the opposite point as PZ was making.
Fortunately for those who believe that Chr2 in humans is the fusion of two different chromosomes in other great apes, PZ's understanding of what the authors were saying when they said that the motif occurred more than 500,000 times is completely wrong. But given that the point of the talk was to teach people how to know more about genetics than a creationist, it's pretty fucking funny.
Other fun parts of the video include PZ saying that humans "evolved from apes" (instead of having a common ancestor) and that most of the bases on our chromosomes are "just random junk" (instead of being relics of inactive genes). The guy is a total clown.
Here's the video, if you want to check my story:
[youtube]-tCqtX4wriU[/youtube]
You are wrong.
"scroll the video back to 13:20 and you'll see - according to PZ, at least - that the TTAGGG motif was actually found more than 500,000 times, i.e., about 10 times the rate predicted by chance."
No, watch it again.
The 500,000 figure isn't the number of motifs. It refers to the total number of all the bases in the TTAGGG motif in both orientations, which can be calculated by adding up the sum of all the incidences of TTAGGG and CCCTAA on chromosome 2 and then multiplying that by six.
The 'evolved from an ape' and the 'junk DNA' points may not be totally accurate (and yes, I have no doubt that he's nitpick someone else for saying something that is not entirely scientifically exact), but it's meant for a non-scientific audience so I wouldn't worry too much that he's simplifying it for them.
It's easy to point out bad stuff that Myers has done or said without thrashing his knowledge of evolution - which is really not very controversial.
I happen to think he's OK when talking about evolution.
He's not particularly brilliant on that subject (even Aron Ra - a non biologist - is more entertaining) but he generally gets the facts correct.