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Why is 'gel electrophoresis' important for....

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Why is 'gel electrophoresis' important for....

Postby davy k » Mon May 16, 2005 2:40 pm

Why is 'gel electrophoresis' important for deoxyribonucleic acid (DNA) testing in criminal cases?
What are the stages and function of Meiosis?
Why do worms wiggle?
Is the basis of consciousness matter or structure?
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Postby skilban » Mon May 16, 2005 2:44 pm

meiosis function is the following:
Haploid reproduction cells are the product of meiosis I and II and a post-meiotic differentiation phase. In animals these reproduction cells are called gametes, in plants and fungi often also spores.
Not only are the number of chromosomes and DNA amount reduced, but also DNA is echanged between the homolog chromosomes of the original diploid cells ). Four haploid daughter cells are formed through the meiotic process, each of them with an own genetical composition, different as well from that of the diploid mothercell.

Ok hope this helps davy
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Postby MrMistery » Mon May 16, 2005 6:22 pm

Donno about those criminals but gel electrophoresis works like this: under the influence of electricity the different fragments of DNA migrate towards the anod. The shorter they are the more they migrate. I guess aplied to certain sections of DNA that is unique in every human it can determine if it is the same DNA and thus, identify criminals. Not sure though

At meiosis only one thing to add: plants also have gamets, but they also have spores. It is NOT the same thing

Don't know what "to wiggle" means since English is not my native language

Don't understant the last question at all...
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ANdrew
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Postby Chris4 » Mon May 16, 2005 7:26 pm

Such different questions :shock:

The first two have pretty much been answered.

Why do worms wiggle? Wiggle is the action that the worms make to move. To me this question doesnt make sense. Its like saying why do snakes move the way they do. Why do we walk the way we do. You understand? :)
Its the easiest way for them to move. :?
I guess it could be the best way to get through soil.
The dictionary definition of wiggle: To move back and forth with quick irregular motions.

Is the basis of consciousness matter or structure? Thats a difficult question. I suggest you look at Wikipedia. http://en.wikipedia.org/wiki/Consciousness
This site also seems to contain a lot of info: http://plato.stanford.edu/entries/consciousness/#2
This is Philosophy. Which i didnt learn at school so know very little and cant comment.
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Postby MrMistery » Mon May 16, 2005 7:28 pm

Yey.. I have learned a new word today: to wiggle :D :D :D
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
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