Results 21 to 30 of about 13,896 (236)

Ancient evolutionary trade-offs between yeast ploidy states. [PDF]

PLoS Genetics, 2013
The number of chromosome sets contained within the nucleus of eukaryotic organisms is a fundamental yet evolutionarily poorly characterized genetic variable of life.
Enikö Zörgö, Karolina Chwialkowska, Arne B Gjuvsland, Elena Garré, Per Sunnerhagen, Gianni Liti, Anders Blomberg, Stig W Omholt, Jonas Warringer   +8 more
doaj   +1 more source

The mutational meltdown in asexual populations [PDF]

, 1993
Loss of fitness due to the accumulation of deleterious mutations appears to be inevitable in small, obligately asexual populations, as these are incapable of reconstituting highly fit genotypes by recombination or back mutation. The cumulative buildup of
Butcher, D., Bürger, Reinhard, Gabriel, Wilfried, Lynch, Michael   +3 more
core   +1 more source

Male infant with paternal uniparental diploidy mosaicism and a 46,XX/46,XY karyotype

American Journal of Medical Genetics. Part A, 2019
A male patient with mosaic paternal uniparental diploidy (PUD) is presented. After birth, the patient presented with hypoglycemia, hemihypertrophy, umbilical hernia, and hepatomegaly.
I. Spier, H. Engels, S. Stutte, H. Reutter, E. Bartels, Sarah Matos Meder, M. Begemann, E. Mangold, T. Eggermann   +8 more
semanticscholar   +1 more source

Critical mutation rate has an exponential dependence on population size in haploid and diploid populations [PDF]

, 2013
Understanding the effect of population size on the key parameters of evolution is particularly important for populations nearing extinction. There are evolutionary pressures to evolve sequences that are both fit and robust.
Aston, E, Channon, A, Day, C, Knight, CG
core   +5 more sources

A century of theories of balancing selection. [PDF]

Biol Rev Camb Philos Soc
ABSTRACT Traits that affect organismal fitness are often highly genetically variable. This genetic variation is vital for populations to adapt to their environments, but it is also surprising given that nature – after all – ‘selects’ the best genotypes at the expense of those that fall short.
Ruzicka F, Zwoinska MK, Goedert D, Kokko H, Li Richter XY, Moodie IR, Nilén S, Olito C, Svensson EI, Czuppon P, Connallon T.   +10 more
europepmc   +2 more sources

Strategies for the evolution of sex [PDF]

, 2001
We find that the hypothesis made by Jan, Stauffer and Moseley [Theory in Biosc., 119, 166 (2000)] for the evolution of sex, namely a strategy devised to escape extinction due to too many deleterious mutations, is sufficient but not necessary for the ...
A. Bernardes, A. Kondrashov, A. Pekalski, Ayşe Erzan, B. Chopard, B. Drossel, B. Örcal, C. Chisholm, D. Stauffer, D. Stauffer, E.J. Lyons, E.P. Solomon, Erkan Tüzel, H.L. Muller, J. Maynard Smith, J. Maynard Smith, J. Maynard Smith, J. Thoms, J.M. Smith, J.S. SaMartins, L.M. Prescott, M. Eigen, N. Jan, R.J. Redfield, S.S. Mader, T.J. Penna, Volkan Sevim, W.D. Hamilton, Y. Cui   +28 more
core   +2 more sources

Karyological analysis of the five native Macaronesian Festuca (Gramineae) grasses supports a distinct diploid origin of two schizoendemic groups

Anales del Jardín Botánico de Madrid, 2009
A karyological analysis has been conducted of all five native Macaronesian Festuca grasses belonging to fine-leaved F. subg. Festuca sect. Aulaxyper and broad-leaved F. subg. Drymanthele sect. Phaeochloa Loliinae lineages.
Miguel Menezes de Sequeira, Antonio Díaz-Pérez, Arnoldo Santos-Guerra, Juan Viruel, Pilar Catalán   +4 more
doaj   +1 more source

Dominance learning in diploid genetic algorithms for dynamic optimization problems [PDF]

, 2006
Copyright @ 2006 YangThis paper proposes an adaptive dominance mechanism for diploidy genetic algorithms in dynamic environments. In this scheme, the genotype to phenotype mapping in each gene locus is controlled by a dominance probability, which is ...
Yang, S
core   +1 more source

Population-based incremental learning with memory scheme for changing environments [PDF]

, 2005
Copyright @ 2005 ACMIn recent years there has been a growing interest in studying evolutionary algorithms for dynamic optimization problems due to its importance in real world applications.
Yang, S
core   +1 more source

Cryptic fitness advantage: diploids invade haploid populations despite lacking any apparent advantage as measured by standard fitness assays. [PDF]

PLoS ONE, 2011
Ploidy varies tremendously within and between species, yet the factors that influence when or why ploidy variants are adaptive remains poorly understood.
Aleeza C Gerstein, Sarah P Otto
doaj   +1 more source