6days
New member
JoseFly said:6days said:In bacteria, a wide range of mutations can be shown to provide a beneficial phenotype to the cell. These benefits are often of sufficient phenotypic affect that they can undergo strong positive selection.
Does the "Biblical model of creation" include natural selection or not? You and AiG say it does, Stripe says natural selection never happens. Which is it? Kinda hard to discuss this if you guys can't even agree on the basics.
Its also kinda hard to discuss when you keep trying to move the goalposts.
JoseFly said:[
Also, I really don't feel like playing your little creationist game where you post a link to a creationist site
Then don't ask for citations to back up what I said.
JoseFly said:6days said:No exactly correct. In the past, it was believed the vast majority of mutations were neutral or silent.
However, part of the reason for that belief was the false belief in "junk DNA". If 97% of our DNA was garbage, then it made sense that mutations in that region were neutral. However, ENCODE is changing the way geneticists look at our DNA, as well as how they look at mutations.
BUT..... even before ENCODE results were released, geneticists usually would not consider a mutation completely neutral. For example Kimura famously showed that with mutations there is a "zone of near-neutrality". In his graph, he shows no mutations that are absolutely neutral.
Your biggest mistake, or misrepresentation though is in saying "the rest of the mutations are deleterious or beneficial". You say that as if they are on a equal playing playing field. But, mutations that have a beneficial outcome, are so rare that geneticists such as Kimura do not even factor them in on a graph. (Crow agrees) Everything he shows is to the left of the absolute zero. (beneficial would be to the right) Geneticists have pegged beneficial mutations at 1 in 1 million (Lenski and Gerrish).
You know, it's pointless to cite things without providing the name and date of the papers, and the journal in which they were published. Are you intentionally hiding those things so I won't look them up, or did you just forget?
As to Encode results... google, although I can provide links to you if you wish.
As to geneticists not considering a mutation completely neutral. Its impossible to prove any mutation has zero effect, and most geneticists like Kimura refer to them with term such as near neutral, or effectively neutral.
As to Kimura and near neutral mutations... (none as totally neutral) http://www.ncbi.nlm.nih.gov/pmc/articles/PMC383841/?page=2
As to Gerrish and Lenski...http://www.google.ca/url?sa=t&rct=j...0UrmeApqpRj7_aFg9CKzDg&bvm=bv.112064104,d.cGc