UnThreaded | Threaded | Whole Thread (7) | Ignore Thread Prev Thread | Prev | Next | Next Thread
Author: benjd25 Big gold star, 5000 posts Old School Fool Add to my Favorite Fools Ignore this person (you won't see their posts anymore) Number: of 25060  
Subject: Re: So How Do You Explain This? Date: 9/17/2012 12:42 PM
Post New | Post Reply | Reply Later | Create Poll Report this Post | Recommend it!
Recommendations: 3
What you should really know about the concept of junk DNA is that, first, it was not based on what scientists didn't know, but rather on what they did know about the genome; and second, that concept has held up quite well, even in light of the ENCODE results. Among the reasons that scientists in the 1970s and '80s began to believe that much of the genome is non-functional was the observation that very similar species could have very different genome sizes. There is no reason to believe that similar species require dramatically different amounts of functional DNA, and thus something other than functional requirements must explain differences in genome size. Scientists also discovered that our genomes contain parasitic, virus-like elements called "transposons" that have the ability copy themselves within our cells. This DNA ecosystem makes our genomes more like a jungle than a precision machine. At the latest count, transposon-derived DNA makes up at least half of our genome. The transposon-derived sequences in our genomes do not have to be explained by invoking some useful function for it. There is no mystery here: this DNA is there because it can replicate.

Michael White: A Genome-Sized Media Failure
http://www.huffingtonpost.com/michael-white/media-genome-sci...
Post New | Post Reply | Reply Later | Create Poll Report this Post | Recommend it!
Print the post  
UnThreaded | Threaded | Whole Thread (7) | Ignore Thread Prev Thread | Prev | Next | Next Thread

Announcements

Pencils of Promise - Back to School Drive
"Pencils of Promise works with communities across the globe to build schools and create programs that provide education opportunities for children."
Post of the Day:
Apple

Microsoft Admits Defeat and Wins?
What was Your Dumbest Investment?
Share it with us -- and learn from others' stories of flubs.
When Life Gives You Lemons
We all have had hardships and made poor decisions. The important thing is how we respond and grow. Read the story of a Fool who started from nothing, and looks to gain everything.
Community Home
Speak Your Mind, Start Your Blog, Rate Your Stocks

Community Team Fools - who are those TMF's?
Contact Us
Contact Customer Service and other Fool departments here.
Work for Fools?
Winner of the Washingtonian great places to work, and "#1 Media Company to Work For" (BusinessInsider 2011)! Have access to all of TMF's online and email products for FREE, and be paid for your contributions to TMF! Click the link and start your Fool career.
Advertisement