Genetic Changes In Mice 'Question Evolution Speed'

Ananova ^ | 5-21-2003

[blam]

Genetic changes in mice 'question evolution speed'

A species of mouse has evolved dramatically in just 150 years, showing genetic change can occur much faster than was thought possible.

The discovery was made by accident by two American biologists studying the genetic make-up of a common wild mouse in Chicago.

Dr Dennis Nyberg and Dr Oliver Pergams, both from the University of Illinois at Chicago, analysed DNA samples from 56 museum specimens of the white-footed mouse dating back to 1855, and 52 wild mice captured from local forests and parks.

They found startling genetic differences between the 19th century and modern mice.

Only one of the present-day mice had DNA that matched that of mice collected before 1950.

While fast evolutionary change has been seen in fruit flies, such rapid evolution in a mammal has not been reported before.

The scientists, whose findings appear in the journal Nature, believe humans may have been partly responsible for the "new" mice.

"Settlers may have brought in mice with the favourable gene that were able to out-compete mice with the native variant," said Dr Pergams.

Story filed: 18:18 Wednesday 21st May 2003

[ALS]

oh yeah I get it, do you?

an admission that try as they may to fill all the ADMITTED holes, it's still just a Crap Theory.

[Dataman]

a MERE RAG of an HYPOTHESIS.

[PatrickHenry]

Well, I got 999, and that ain't bad.

[ALS]

[f.Christian]

Laughed out of town is what all these darwinists -- rap science --- NEEDS !

[ALS]

I think these guys are here just to score up posting points.

Lawdee knows it ain't to defend their Crap Theory.

[js1138]

On the other hand, she might enjoy taking on a woman hater. I have just about decided that ALS is a DU plant, here to troll up some laughs. Either that or an evolutionist trying to discredit creationists.

Don't tell ALS what "discredit" means or he might beat up a woman, just to get even.

[ALS]

Right now these guys are involved in a slew of hand-wringing and trying to figure out who they can bring in to save them, since they've obviously made complete baboons out of themselves.

oh the agony

courtesy reminder of why:
"...I am quite conscious that my speculations run beyond the bounds of true science...It is a mere rag of an hypothesis with as many flaw[s] and holes as sound parts."
(Charles Darwin to Asa Gray, cited by Adrian Desmond and James Moore, Darwin, (New York: W.W. Norton and Company, 1991) p. 456, 475.)

[f.Christian]

Three blind mice ...

see how they run ---

thay all ran after the farmer's wife ...

she cut off their tale with a carving knife ---

three blind mice ---

see how they SPUN !

[conservababeJen]

Seems as though the Eviloonies are having some troubles touching on this..

"...I am quite conscious that my speculations run beyond the bounds of true science...It is a mere rag of an hypothesis with as many flaw[s] and holes as sound parts." (Charles Darwin to Asa Gray, cited by Adrian Desmond and James Moore, Darwin, (New York: W.W. Norton and Company, 1991) p. 456, 475.)

[js1138]

now ya gotta go getta girl for your fights?

At least I know some.

[Aric2000]

You're right, she would probably find it interesting, in a sick twisted sort of way. But you never know, he might actually learn something.

[f.Christian]

All warp ... no woof (( tapestry )) --- all rags !

[ALS]

"On the other hand, she might enjoy taking on a woman hater. I have just about decided that ALS is a DU plant, here to troll up some laughs. Either that or an evolutionist trying to discredit creationists."

oh you got me. that's why I created ConservaBabes.com
In the hopes that one day, I could come on this thread and bash females.

btw - I didn't know you guys were gals.

exposeeeeeee!

[conservababeJen]

Hey, you're a riot. Did you learn that in the first or 2nd grade?

[Right Wing Professor]

So, as the primordial soup became protein enriched, how did the single-celled creatures evolve into something with a nervous system, a circulatory system, a respiratory system, and a digestive system, all of which rely upon al of the others for their own function and existence

Single celled creatures probably first evolved into undifferentiated multicellular agglomerates. Once you had many cells, a primitive kind of intercellular communication probably arose, which made it possible for some differentiation to occur. After all, single cells respond to external chemical signals; at some stage they started responding to substances other cells were making. So, in effect, this allows one cell to tell the second, 'you take care of sex, and I'll do the rest'. Ever see a slime mold do its thing? It's fascinating to watch.

You have still in existence several very primitive creatures with two body layers, differentiated essentially into gut and external layer. The gut could then evolve more complex structures. The chordate nervous system evolved from a more primitive notochord, which was initially an involution of the external layer of cells.

It is untrue to say that all these systems depend on others. There are many, many organisms that lack nervous systems; many that lack respiratory systems; and quite a few that lack digestive systems.

It is true there is a relative paucity of fossil data for very small, soft bodied creatures. There is, however, other evidence, particularly biochemical and genetic evidence. We can trace complex intracellular communication pathways in chordates to more primitive systems in tunicates and to other systems in invertebrates, by looking at the genes.

But if you want a single general principle or evolution of complex biological systems, it's duplication followed by differentiation. If you want a big complex biological system, be it a large multi-subunit protein, or an organ, or an organism, or a genome, start with a single subunit and duplicate it. Once you have two, they can develop separate and interdependent functions, without compromising any essential ones.

[ALS]

"now ya gotta go getta girl for your fights?"

"At least I know some."

ok, we get it now...

[js1138]

I think Alamo would hide her face in shame if she saw this thread. She may be an IDer, but she once participated in a rather civilized 6000 post thread -- no moonpies or woman beaters.

[ALS]

attacking girls again?

[Dataman]

To Aric2000: make some sense bubber!

Better yet, get some REAL scientists.