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Organon
|
2018
|
vol. 50
101-122
EN
The inheritance of acquired characteristics seems to be a trendy hypothesis in the fields of biological and cultural evolution, despite the fact that it has already been refuted many times, and has been shown inconsistent with all the available knowledge accumulated. This paper presents its failure, and its logical and factual inferiority to multilevel selection, offering new hypotheses explaining its attractive power. The argumentation aims to prove that the biological variations (genetic mutations) and cultural variations (intellectual innovations) are certainly not changes directed by the environment, but are analogous to stochastic changes which are closely channeled by many selective screens, according to the synergic theory of evolution and the synergic theory of the human sciences and their core, multilevel selection.
PL
W artykule poruszone zostało zagadnienie pochodzenia zmienności genetycznej. Dwa jej źródła to: mutacje genetyczne i rozmnażanie płciowe. Autorki zasadniczo skupiają się na mutacjach, kwestii rozmnażania płciowego pozostawiając rolę wstępu. Mieszanie genów od nieidentycznych osobników, przekazywanie różnego materiału genetycznego każdemu z potomków oraz rekombinacja genów w procesie crossing-over są podstawowymi skutkami rozmnażania płciowego. Co do mutacji genetycznych, to oprócz całkowicie ślepych zmian genomu oraz w pełni ukierunkowanych reakcji fizjologicznych organizmu, zdaniem autorek, istnieje całe spektrum procesów, które należałoby umieścić gdzieś między dwoma tymi ekstremami. Omówieniu tego trzeciego typu mutacji – nie do końca losowych, ale też nie w pełni zdeterminowanych – poświęcona jest zasadnicza część tekstu.
EN
The article brings up the issue of genetic variability source. Two causes of that variability are genetic mutations and sexual reproduction. The authors generally focus on the mutations. The issue of sexual reproduction is concerned only as an introduction. Mixing of genes from non-identical parents, transmission of different genetic material to every descendant, and recombination of genes in the crossing-over process are the main effects of sexual reproduction. As for genetic mutations, authors say that in addition to entirely blind genetic variation and absolutely directed physiological reactions of organism there is a whole spectrum of processes which should be placed somewhere between these two extremes. The basic part of this text refers to this particular third type of mutations – not exactly random but, at the same time, not entirely determined.
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