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Author | Topic: Can Chromosome Counts Change? | |||||||||||||||||||||||||||
DNAunion Inactive Member |
quote: Sure we know that, because competent authorities in the field have told us that: that's how we know.
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DNAunion Inactive Member |
quote: Yes, we know that...because many competent authorities in the field have told us. Or are you claiming that you yourself Crashfrog have done the experiments that actually demonstrate such? [This message has been edited by DNAunion, 12-27-2003]
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DNAunion Inactive Member |
quote: Really? On what grounds do you make such a claim? What experiments have you yourself performed that showed that DNA codes for proteins? Gee, could you be relying upon competent authorities in the field for that fact?
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AdminAsgara Administrator (Idle past 2329 days) Posts: 2073 From: The Universe Joined: |
Please take the issue of using competent authority to another thread. I don't want this issue drug into every thread that you participate in.
If I remember correctly, this thread is about chromosome count, speciation, and interbreeding. ------------------
AdminAsgara Queen of the Universe
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Peter Member (Idle past 1506 days) Posts: 2161 From: Cambridgeshire, UK. Joined: |
No. Relying on authority would be to say something
like 'Prof. Bloggs says speciation happens.' What crashfrog is doing is referring to the accumulated,properly recorded observations of the biological community. When one refers to formalised results one is not relying onauthority ... otherwise no-one could say anything unless they had seen it in person.
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Peter Member (Idle past 1506 days) Posts: 2161 From: Cambridgeshire, UK. Joined: |
Sorry didn't see this before I posted the other comment!!
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blitz77 Inactive Member |
quote: As usual, an argument about "information". In the strictest sense yes, as you have an increased quantity of information (like 2 copies of a book instead of one), but whether there is any novel information is something else (ie new protein families). Of course, instead of using the term "information" it is probably better to use "fitness". So for example, triticale(n=21), a hybrid between rye (n=7) and wheat (n=14) in many environmental circumstances has a higher "fitness" compared to rye or wheat.
quote: That sounds like you're going off on a tangent. I thought we were talking about chromosome duplications/non-disjunction/fusion of genomes, etc not mutations [This message has been edited by blitz77, 01-08-2004]
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agrav8r Inactive Member |
learned anything new?
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agrav8r Inactive Member |
learned anything new?
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agrav8r Inactive Member |
learned anything new
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agrav8r Inactive Member |
You seem to be of the opinion that a copy isn't new information. You need to disabuse yourself of this notion.
Your right, what could i have been thinking?
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NosyNed Member Posts: 9004 From: Canada Joined: |
like 2 copies of a book instead of one No, not like two copies of a book. A bit more like to coffee machines. You get twice as much of something. I'd have to do some digging to find a reference but there are cases where a duplicated gene makes a difference in the phenotype. Of course, there are also places where duplication then allows a place for mutations to accumulate. Do you agree there is new information at that point? Common sense isn't
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zephyr Member (Idle past 4577 days) Posts: 821 From: FOB Taji, Iraq Joined: |
I think you proved his point, actually. Your second post was more aggravating than the first. It's like a second gene that provides a greater amount of a protein, thus changing a structure. The third even showed mutation which added no obvious function beyond further irritation, but might over time mutate further. A different deletion in the third post (such as the first letter) could have provided new function that did not previously exist.
How you like them apples?
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blitz77 Inactive Member |
quote: Doh.... that's from a difference in gene EXPRESSION. The protein produced is still the same, but the expression of the gene would be different. Yes, it may affect phenotype, as for example in plants where hexaploid, tetraploid plants, etc show different phenotypes to plants that are simply diploid, but as for novel information.... that is something else.
quote:If they mutate, they may produce different proteins. Thus you could say that the information is different. Where you and I may disagree is whether novel protein families could arise by mutations.
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NosyNed Member Posts: 9004 From: Canada Joined: |
Where you and I may disagree is whether novel protein families could arise by mutations.
Why not? If the coding gene changes wouldn't a new protein result. What is a protein family?
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