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#50777 12/28/01 05:46 PM
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then there is Fischer's Corollary which refers specifically to people and makes some sort of pointed imputation as to 99% of them....


#50778 12/28/01 06:22 PM
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"sexually", by fusion of the genetic matter of two separate individuals.

Yeahbutİ, the fusion of genetic material is not sexual in the way we normally think of sexual, i.e., genetic material from one individual introduced to the other individual, in which other individual the offspring develops. What happens in the paramecia is that genetic material is traded and each then proceeds to divide in the normal asexual manner. Biology was never my strong suit so perhaps this is defined as sexual in some technical way that I am unaware of, in which case I will stand corrected, but until then I stand fast.


#50779 12/28/01 07:29 PM
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Faldage, yours a very interesting point, and it comes down to defining precisely what is meant by "sexual" (as opposed to asexual) reproduction.

Concept-spinning here, and without any LIU, I would think the key point is that the DNA from two distinct individuals is combined, so that the offspring has DNA which each parent (individually) lacked, and thus brings together a new and potentially valuable combination of DNA. With asexual reproduction, the offspring would generally be a clone of its parent (except for mutations), thus minimizing the diversity from which natural selection (using that phrase in the biological sense) could select.

and yes, dr. bill, there are forms of asexual reproduction in which the offspring cell has only part, but not all, of the DNA of the parent cell, and hence is not a clone thereof. One example would be meiosis, the production of haploid cells from a diploid parent-cell.

That is, I would thing that the test of whether reproduction is "sexual" would be whether genetic material so as to product a new combination -- regardless of how that new-combination cell then proceeds.

But I will say that bartleby provides no clear answer, as far as I can tell.

I'd think the test cannot be whether the genetic material combines (and/or the offspring develops) at a place inside or a place outside the body of a parent. For by that test, fish would be deemed asexual:

THE FISH
...
The chastest of the vertebrates,
He never even sees his mates,
but when they've finished, he appears
And O.K.'s all their bright ideas.
--- Ogden Nash

BTW, on the site on which I found this poem, it was immediately followed by Nashs poetic ode to the hippopotamus. Which see. btw #2: "O.K." is verbatim in the original.



#50780 12/28/01 07:53 PM
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Interesting point on the fish, Keiva, although there are fish in which one or the other of the parents carries the fertilized eggs. As I said before, the biological intricacies are beyond me. Not to mention the universe being full of a great number of things.


#50781 12/28/01 07:57 PM
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Faldage, I guess this is one where neither of us knows the answer -- but at least we know that we don't know!


#50782 12/28/01 09:03 PM
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Dear Keiva,

You wrote in a hidden way:

[Bright Blazing Red]BTW, on the site on which I found this poem, it was immediately followed by Nashs poetic ode to the hippopotamus. Which see. btw #2: "O.K." is verbatim in the original.[/Bright Blazing Red]

You were just seeing whether I could stay away, weren't you? Now admit it!!

I think, by the way, that your arguments for sexual reproduction of paramecia make perfectly good sense, mixing of varieties of DNA into the paramecia goulash, and all that.

Best regards,
DubDub Who really cannot resist a hippo.


#50783 12/28/01 09:30 PM
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Warning: Never let a hippo hoppoo.


#50784 12/28/01 09:54 PM
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Subject: Re: Sex life of paramecia
Warning: Never let a hippo hoppoo.


If we start talking about the sex life of hippos, ... I'm leaving.



#50785 12/28/01 11:03 PM
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Dear Keiva,

But you sounded so terrifically clinical in your hypothesizing! Listen to yourself:

Concept-spinning here, and without any LIU, I would think the key point is that the DNA from two distinct individuals is combined, so that the offspring has DNA which each parent (individually) lacked, and thus brings together a new and potentially valuable combination of DNA. With asexual reproduction, the offspring would generally be a clone of its parent (except for mutations), thus minimizing the diversity from which natural selection (using that phrase in the biological sense) could select.

Now that's just darned great stuff there! Just use the same voice when clinically describing the mating habits of the hippopotamus! The cold, direct, clinical eye and no nonsense. See? After all, the hippo's just a gigantic, more complex version of the paramecium, hmmmmm?

Best regards,
Dub


#50786 12/28/01 11:08 PM
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A potentially crushing experience.


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