May 14th, 2010, 10:38 AM
What is it that causes every animal on Earth to want to mate and reproduce? Humans will feel attraction and love towards the person one would like to mate with, but most animals, and probably no insects do.
So, why do all living things want to reproduce?
Sexually reproducing organisms seem to be programmed that way. How this occurred is not known. It is, currently, yet another intractable issue with only speculation and conjecture to guide us. There are no specific scientifically valid ideas on this as far as I am aware.
stop spreading disinformationOriginally Posted by cypress
Convincing response, twit. Yet you offer no indication or evidence of any error. Search for theories on how sexual reproduction arose and let's discuss the evidence, lets discuss how the idea might be tested and how it might be falsified. While we are at it let's describe the alternatives. I am anxious for a thoughtful response from you.stop spreading disinformation
May 14th, 2010, 01:27 PM
That's wishful thinking cypress. You really love to find gaps, or just invent them. The less we know, the more space for just assuming something supernatural is in there. It's getting old.
The desire to reproduce has a genetic basis, driven by all manner of genes including the sex hormones. For example, in humans testosterone increases libido in both genders. Testosterone synthesis is controlled by several genes working together, so the efficiency, level etc of testosterone is inheritable. Any inherited trait that increases your chances of reproducing and/or surviving is obviously going to undergo positive selection, and will increase in the population over time, out competing less optimal varieties. Think about it this way- if you have 2 kids and one of them grows up to have low sex drive due to say, low testosterone production, which of your two kids is the more likely to produce more offspring? Move on to their kids, and the generation after and soon you find that kid A's progeny are being out competed by kid B's.
May 14th, 2010, 02:00 PM
Strange that you would accuse me of assuming the improbable when it is just what you are doing. I on the other hand advocate for an process that is capable of explaining what is observed. I think that your just so stories are getting old.That's wishful thinking cypress. You really love to find gaps, or just invent them. The less we know, the more space for just assuming something supernatural is in there. It's getting old.
The problem with this answer is that it is a description of how adaptation of a single existing trait in isolation might work. It is not an answer to the question asked which is about how sexual reproduction (a very complex system of coherent and correlated processes) occurred in the first place. Selection, as it is described cannot preselect traits or processes or subprocesses so it cannot account for origin of sexual reproduction. This represents a fundamental weakness in this narrative and suggests that other more fruitful processes should be considered. I will continue to raise this argument as long as others tirelessly continue to advocate for a process that lack explanatory power for the questions raised.The desire to reproduce has a genetic basis, driven by all manner of genes including the sex hormones. For example, in humans testosterone increases libido in both genders. Testosterone synthesis is controlled by several genes working together, so the efficiency, level etc of testosterone is inheritable. Any inherited trait that increases your chances of reproducing and/or surviving is obviously going to undergo positive selection, and will increase in the population over time, out competing less optimal varieties. Think about it this way- if you have 2 kids and one of them grows up to have low sex drive due to say, low testosterone production, which of your two kids is the more likely to produce more offspring? Move on to their kids, and the generation after and soon you find that kid A's progeny are being out competed by kid B's.
Cypress, the question is not about how sexual reproduction evolved. The OP is asking about "desire", basically. It would seem to be more a question about the nature of this instinct - why do male members of a species want to "get it on" with the female members of the species (and vice versa)? How are these urges programmed into the organism? How do we get from gene sequences to instinctual behaviours?
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