Results 241 to 250 of about 1,488,947 (292)

Genetic circularity and evolution

Journal of Theoretical Biology, 1968
Abstract A well-documented observation for which there is at present no satisfactory explanation is the fact that in many simple non-nucleated systems, the chromosome has a ring structure. A model is proposed here which directly implicates cyclic polynucleotides in the evolutionary process.
D C, Reanney, R K, Ralph
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Genetic algorithms and evolution

Journal of Theoretical Biology, 1990
The genetic algorithm (GA) as developed by Holland (1975, Adaptation in Natural and Artificial Systems. Ann Arbor: University of Michigan Press) is an optimization technique based on natural selection. We use a modified version of this technique to investigate which aspects of natural selection make it an efficient search procedure.
B H, Sumida, A I, Houston, J M, McNamara, W D, Hamilton   +3 more
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Genetic Evolution of Morphology

Science, 1997
Two commentaries in the 4 July issue, by their contrast, inadvertently point to a missing element in most discussions of the evolution of animal form. In his Perspective “Which came first, the hypha or the yeast?” ([p. 52][1]), P. T. Magee draws the lesson from a report by B. R. Braun and A. D. Johnson ([4 July, p.
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Evolution and Genetic Engineering

2013
A cell’s genotype represents the cell’s genetic potential, whereas its phenotype represents the expression of a culture’s potential. The genotype of a cell can be altered by mutations. Mutations may be selectable or unselectable . The rate of mutation can be enhanced by the addition of chemicals called mutagens or by radiation.
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GENETIC ARCHITECTURE, GENETIC BEHAVIOR, AND CHARACTER EVOLUTION

Annual Review of Ecology and Systematics, 1994
Nonadditive gene interaction or epistasis is a central component of hypotheses that postulate a creative role for small populations and founder events in character evolution and speciation. Because quantitative or small effect vari­ ation is considered to be the basis of evol utionary change, the claim that this variation shows mostly additive behavior
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Evolution and Genetics

2020
Why was the discovery of genetics so important for our understanding of evolution? Despite the fact that Darwin’s theory of evolution was widely acclaimed by his scientific contemporaries, it had a central weakness that left it open to criticism.
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Developmental genetics and evolution.

The International journal of developmental biology, 1997
Peer ...
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Genetics and Evolution

1986
In eukaryotes this important organelle consists of the following: Open image in new ...
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Genetic testing in prostate cancer management: Considerations informing primary care

Ca-A Cancer Journal for Clinicians, 2022
Veda N Giri, Todd M Morgan, David Morris
exaly  

Genetics and Evolution

1941
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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