Random Numbers Generation
Mostrando 13-16 de 16 artigos, teses e dissertações.
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13. Experimental Population Genetics of Meiotic Drive Systems. III. Neutralization of Sex-Ratio Distortion in Drosophila through Sex-Chromosome Aneuploidy
Laboratory populations of Drosophila melanogaster were challenged by pseudo-Y drive, which mimics true Y-chromosome meiotic drive through the incorporation of Segregation Distorter (SD) in a T(Y;2) complex. This causes extreme sex-ratio distrotion and can ultimately lead to population extinction. Populations normally respond by the gradual accumulation of dr
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14. Transposon-Mediated Single-Copy Gene Delivery Leads to Increased Transgene Expression Stability in Barley1
Instability of transgene expression in plants is often associated with complex multicopy patterns of transgene integration at the same locus, as well as position effects due to random integration. Based on maize transposable elements Activator (Ac) and Dissociation (Ds), we developed a method to generate large numbers of transgenic barley (Hordeum vulgare va
American Society of Plant Physiologists.
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15. Polygenic Mutation in Drosophila Melanogaster: The Causal Relationship of Bristle Number to Fitness
The association between sternopleural and abdominal bristle number and fitness in Drosophila melanogaster was determined for sublines of an initially highly inbred strain that were maintained by divergent artificial selection for 150 generations or by random mating for 180 generations. Replicate selection lines had more extreme bristle numbers than those tha
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16. Effective Size of Populations under Selection
Equations to approximate the effective size (N(e)) of populations under continued selection are obtained that include the possibility of partial full-sib mating and other systems such as assortative mating. The general equation for the case of equal number of sexes and constant number of breeding individuals (N) is N(e) = 4N/[2(1 - α(I)) + (S(k)(2) + 4Q(2)C