|
QuickSearch
Welcome! You are not logged in. [ Login ] |
EvC Forum active members: 85 (8950 total) |
| Aussie, Diomedes, DrJones*, Faith, GDR, Hyroglyphx, ringo, Tangle, Thugpreacha (AdminPhat) (9 members, 27 visitors)
|
Mikee | |
Total: 867,229 Year: 22,265/19,786 Month: 828/1,834 Week: 328/500 Day: 27/64 Hour: 2/10 |
Thread ▼ Details |
|
|
Author | Topic: Quick Questions, Short Answers - No Debate | |||||||||||||||||||||
Dr Adequate Member Posts: 16107 Joined: Member Rating: 8.3 |
We know the mutation rate. This can be both measured directly and inferred from populations with a known date of separation.
--- Anyone want to answer mine? Edited by Dr Adequate, : No reason given.
|
|||||||||||||||||||||
Itinerant Lurker Member (Idle past 998 days) Posts: 67 Joined: |
Thanks for the reply, do you know offhand of any specific examples of where mutation rates can be directly measured?
|
|||||||||||||||||||||
Dr Adequate Member Posts: 16107 Joined: Member Rating: 8.3 |
You do it by measuring the incidence of spontaneous genetic diseases.
For example, you're talking about mitochondrial DNA. Now, there are some genetic diseases which affect mitochondrial DNA. So if a child has them, and the mother doesn't, then that represents a mutation. Now given that mutations are random, there's no particular reason why that harmful mutation should be of higher frequency than neutral mutations. So you can use the incidence of such mutations to measure the mutation rate generally. I'm too lazy to find a reference right now about mitochondria, but here's a paper where the guy does the same thing for dominant diseases in non-mitochondrial DNA. --- Now someone answer my question, dammit. Edited by Dr Adequate, : No reason given.
|
|||||||||||||||||||||
Itinerant Lurker Member (Idle past 998 days) Posts: 67 Joined: |
awesome
|
|||||||||||||||||||||
Itinerant Lurker Member (Idle past 998 days) Posts: 67 Joined: |
Following the logic of the argument that Adam and Eve were created with perfect genes 6,500 years ago I'm wondering if that doesn't necessarily predict that we should be able to take a look at dna from people three thousand years ago and see a pretty huge difference between it and our dna today in that it should be "half as perfect". Anyone know of an example of this? Or does this pretty much not make sense at all.
Note: By "this" I'm referring to what this argument would predict, not the argument itself which is, of course, absolutely retarded. Edited by Itinerant Lurker, : No reason given. Edited by Itinerant Lurker, : No reason given.
|
|||||||||||||||||||||
Taz Member (Idle past 1634 days) Posts: 5069 From: Zerus Joined: |
I want to find a book in the library. Long time ago, I heard someone give me a brief description of it. It's about a spaceship carrying a group of vampires through space looking for a new home. Earth is suppose to be destroyed or something.
Anyone have any idea what book I'm talking about?
|
|||||||||||||||||||||
Perdition Member (Idle past 1580 days) Posts: 1593 From: Wisconsin Joined: |
Space vampires? I have not heard of this book, but am now intrigued. If you ever find out the title and give it a read, I'd love to hear your thoughts on whether I should likewise try it out.
|
|||||||||||||||||||||
Parasomnium Member (Idle past 1039 days) Posts: 2191 Joined: |
Is this the book you're looking for?
Hint: Google is your friend. "Ignorance more frequently begets confidence than does knowledge: it is those who know little, not those who know much, who so positively assert that this or that problem will never be solved by science." - Charles Darwin.
|
|||||||||||||||||||||
Parasomnium Member (Idle past 1039 days) Posts: 2191 Joined: |
Look here
Again: Google is your friend. "Ignorance more frequently begets confidence than does knowledge: it is those who know little, not those who know much, who so positively assert that this or that problem will never be solved by science." - Charles Darwin.
|
|||||||||||||||||||||
Wounded King Member (Idle past 2437 days) Posts: 4149 From: Edinburgh, Scotland Joined: |
Are you sure you aren't thinking thinking of the plot of the Doctor Who adventure 'State of Decay'?
Totally understandable, that's a great story. TTFN, WK
|
|||||||||||||||||||||
Taz Member (Idle past 1634 days) Posts: 5069 From: Zerus Joined: |
You're misunderstanding me. It's not about space vampires coming to earth. It's about a group of vampires leaving earth to look for a new home. Earth has been destroyed or something like that.
|
|||||||||||||||||||||
Taz Member (Idle past 1634 days) Posts: 5069 From: Zerus Joined: |
I don't know. The exact words he used were a group of vampires wandering through space after Earth is gone. At the time, I really wanted to find the book to read it. But then something traumatic came up in my life and I forgot about it until now.
|
|||||||||||||||||||||
Dr Adequate Member Posts: 16107 Joined: Member Rating: 8.3 |
Thanks, but I was looking for a case where it's been directly observed, rather than where it's been inferred on evolutionary principles.
|
|||||||||||||||||||||
Wounded King Member (Idle past 2437 days) Posts: 4149 From: Edinburgh, Scotland Joined: |
This also isn't exactly what you were looking for ...
In this paper (Bizzarri et al, 2008) what the bacteria lose is not metabolic functions associated with vital function as much as those associated with toxicity to insects which eat the bacterias normal hosts. One of the Lenski lab's long term evolution papers was on this topic (Cooper and Lenski, 2000) and may be more along the lines you were looking for.
Unfortunately they don't identify the specific mutations involved in this paper. Another paper however does go into the molecular genetic details of the loss of ribose catabolism (Cooper et al., 2001). Interestingly they find this loss associated with increased fitness.
TTFN, WK
|
|||||||||||||||||||||
New Cat's Eye Inactive Member |
Please don't reply here, I've started a new thread at How do dogs sense earthquakes?. --Admin
How do dogs sense earthquakes? A quick Google search says that we don't know. Any ideas? Edited by Admin, : No reason given.
|
|
|
Do Nothing Button
Copyright 2001-2018 by EvC Forum, All Rights Reserved
Version 4.0 Beta
Innovative software from Qwixotic © 2019