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>Pulling this out of thin air, but what if a female had a mutation that allows mating with multiple males. Or multiple batches of eggs before they die. True, b
by Accujack 7y ago
>Pulling this out of thin air, but what if a female had a mutation that allows mating with multiple males. Or multiple batches of eggs before they die.
True, but your example essentially says "What if a mutation happened that completely negated the limiting effect of the genetic modifications that have been done." If something this unlikely happens to the moth, of course it's going to change everything. If it happened to a non genetically engineered population of moths, it would change everything for them, too.
If I recall the plot of that book, the scientists in question made the mistake of wholesale copying strings of frog DNA to fill in "gaps" in the Dino DNA they were reconstructing. Apart from being ludicrous from a scientific point of view, the idea is that they copied genes that allowed for a sex change by the organism possessing those genes.
It wasn't anything to do with evolution. Evolution doesn't work on individuals at all, it works on populations over many generations. Until the "dinosaurs" in the story actually reproduced, evolution had no effect on them - it simply could not, because individuals don't change to respond to selection pressure... they either reproduce successfully or don't.
Dinos that had been engineered to not reproduce couldn't evolve at all, hence the "oops we copied the frog's sex change ability to the dinos" plot point.
- beerandt 7y agoYeah, this is why I hesitated to use that example. I get that the filing gaps in DNA and parthenogenesis aspects cloud the analogy. >"What if a mutation happened that completely negated the limiting effect of the genetic modifications that have been done." I wasn't suggesting mutation or evolution or inserted genes. I'm suggesting unintentional selection for a trait already present in the wild gene pool. Combined with the bottleneck intentionally created by the experiment, it could lead to the artificial magnification of a trait (amongst the surviving population) that's the opposite of what the experiment is trying to accomplish. It also makes it likely, not unlikely. The question will be what traits end up being selected for, and how drastically they will affect the genetic fitness of the gene pool. Similar to how antibiotic resistance emerges without ever inserting any specific genetics. Obviously without the benefit of horizontal exchange, but perhaps with other methods of genetic exchange... As the mosquito experiments seem to prove so far, with "infertile" males leaving remnants of their DNA in the surviving population. Which, being bred and distributed, is a different type of horizontal exchange, I suppose. Sidenote: While I wasn't initially including parthenogenic reproduction in my thoughts above, maybe I should have. Recent studies support the parthenogenic reproduction in a surprising number of zw species, including Komodo dragons, mourning geckos, whiptail lizards, some birds, snakes, and... moths. It's pretty fascinating, and more proof that Crichton knew what he was talking about, even if he didn't always fully grasp it. https://en.m.wikipedia.org/wiki/Lepidodactylus_lugubris https://en.m.wikipedia.org/wiki/Lepidodactylus_lugubris https://en.m.wikipedia.org/wiki/Parthenogenesis https://en.m.wikipedia.org/wiki/Parthenogenesis https://en.m.wikipedia.org/wiki/Parthenogenesis_in_squamata https://en.m.wikipedia.org/wiki/Parthenogenesis_in_squamata https://en.m.wikipedia.org/wiki/ZW_sex-determination_system https://en.m.wikipedia.org/wiki/ZW_sex-determination_system