Talk:Sex can't have evolved (Talk.Origins)
I added the following because I thought it would help the article
Also, the Talk Origins article overstates what the Kondrashov article actually stated. Here is what the Kondrashov article abstract states:
The life cycles of cellular species are reviewed from the genetic perspective. Almost all life cycles include stages during which only one genome is transmitted from a parent to its offspring. This, together with interorganismal gene exchange, which occurs regularly in at least some prokaryotes and in the majority of eukaryotes, allows selection to evaluate different alleles more or less independently. Regular genetic changes due to intraorganismal ploidy cycles or recombination may also be important in life cycles of many unicellular forms. Eukaryotic amphimixis is generally similar in all taxa, but the current data on the phylogeny and reproduction of unicellular eukaryotes are insufficient to determine whether it evolved several times or just once. Theoretically , gradual origin of amphimixis from apomixis, with each step favored by natural selection, is feasible. However, we still do not know how this process occurred nor what selection caused it. For reasons not entirely clear, some properties of amphimictic life cycles are much less variable and more conservative than the others. Evolution of many aspects of reproduction requires more theoretical studies, while the existing data are insufficient to choose among the currently competing hypotheses. [1][2]
(regarding the abstract quote above: "Amphimixis is another term for sexual reproduction, generally by the fusion of a male and female gamete and subsequent recombination. The opposite of amphimixis is apomixis: asexual (clonal) reproduction." [3] )
There is a difference between possible and theoretically feasible. Furthermore, the abstract at least adds some scholarly caution in that it states "we still do not know how this process occurred nor what selection caused it" and also adds that the evolutionists are currently choosing between competing hypothesis.
External Links
- The Origin of Gender and Sexual Reproduction by Bert Thompson, Ph.D. and Brad Harrub, Ph.D.
- Argument: Evolution of sex by Jonathan Sarfati
MY COMMENTS REGARDING THE ABOVE:
There is a difference between "possible" (what TalkOrigins states) and theoretically feasible (which is what the abstract of the article stated). Also, the abstract states some scholarly caution when it states: "However, we still do not know how this process occurred nor what selection caused it. For reasons not entirely clear, some properties of amphimictic life cycles are much less variable and more conservative than the others. Evolution of many aspects of reproduction requires more theoretical studies, while the existing data are insufficient to choose among the currently competing hypotheses."
Creationist 03:48, 9 December 2006 (EST)creationist
