Results 251 to 260 of about 1,500,618 (293)

The evolution of the genetic code

Biochimie, 1976
Summary A Model is described for the evolution of proteins within organisms in the primitive environment. The model is then used to show which chemical and biological properties of the amino acids could have been important in the evolution of the genetic code.
R P, Jorré, R N, Curnow
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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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Evolution of a genetic diagnosis

Clinical Genetics, 2013
Understanding the relationship between genotype and phenotype has become an integral part of the diagnosis and management of patients with inherited arrhythmias and cardiomyopathies. Given the existence of background noise, the majority of genetic testing results should be incorporated into clinical decision making as probabilistic, rather than ...
Z, Laksman, D, Dulay, M H, Gollob, A C, Skanes, A D, Krahn   +4 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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Genetic evolution of the Samaritans

Journal of Biosocial Science, 1984
SummaryDetailed pedigrees of the small Samaritan isolate covering the last thirteen generations and consisting of 82 founders and 670 descendants allowed calculations of (a) the probability of origin of genes from particular founder members, and (b) the total number of descendants from each founder.
M H, Cazes, B, Bonne-Tamir
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Evolution: The genetics of trait evolution in cavefish

Current Biology, 2021
Albino cavefish sleep less than their pigmented siblings. A recent study used CRISPR-Cas9-directed mutation to establish unambiguously that loss of function of a single gene, ocular and cutaneous albinism2, underlies both phenotypes, one morphological, the other behavioral.
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Evolution of the genetic code

The Science of Nature, 1973
The origin of the genetic code is not merely an evolutionary juggling of codon assignments until some optimal configuration is achieved. It is, rather, the more interesting and profound problem of how codon assignments arose. This is part and parcel of the origin of a translating mechanism.
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The evolution of genetic topologies

Theoretical Population Biology, 2007
This manuscript explores the simultaneous evolution of population genetic parameters and topological features within a population graph through a series of Monte Carlo simulations. I show that node centrality and graph breadth are significantly correlated to population genetic parameters Phi(ST) and M; (rho=-0.95;rho=-0.98, respectively), which are ...
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THE GENETICS AND EVOLUTION OF GYNODIOECY

Evolution, 1956
To know the breeding system is to know the genetic architecture of a species. To know the evolution of a breeding system is to know how evolution works-on populations and not on individuals. One of the many different breeding systems in plants is male sterility which has been found as a rare mutant in all higher plants that have received more than a ...
D. Lewis, Leslie K. Crowe
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