Crossover sexual
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منابع مشابه
Inbreeding and outbreeding depressions in the Penna model as a result of crossover frequency
The population in the sexual Penna ageing model is first separated into several reproductively isolated groups. Then, after equilibration, sexual mixing between the groups is allowed. We study the changes in the population size due to this mixing and interpret them through a counterplay of purifying selection and of haplotype complementarity.
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In a standard genetic algorithm (GA), individuals reproduce asexually: any two organisms may be parents in crossover. Gender separation and sexual selection here inspire a model of gendered GA in which crossover takes place only between individuals of opposite sex and the GA’s evaluation, selection, and mutation strategies depend on gender. Consequently, a pattern of cross-gender cooperation an...
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Exaggerated sexual displays are often supposed to indicate the indirect benefits females may receive from sexual reproduction with displaying males, but empirical evidence for positive relationships between the genetic quality and sexual trait quality is scant. The explanation for this might lie in the fact that mixing of reproductive individuals whose development has been influenced by genotyp...
متن کاملChromosome-Wide Control of Meiotic Crossing over in C. elegans
A central event in sexual reproduction is the reduction in chromosome number that occurs at the meiosis I division. Most eukaryotes rely on crossing over between homologs, and the resulting chiasmata, to direct meiosis I chromosome segregation, yet make very few crossovers per chromosome pair. This indicates that meiotic recombination must be tightly regulated to ensure that each chromosome pai...
متن کاملThe Effect of High Fiber Diet on Sex Hormones in Early Pubertal Obese Girls a Randomized Crossover Clinical Trial
Introduction: The aim of the present study was to investigate the effectiveness of high-fiber diet on sexual hormones in obese and overweight female adolescents. Methods: This randomized crossover clinical trial was conducted among 56 obese or overweight girls in Shiraz, Iran. All subjects were randomly divided into two groups. A list containing high (25 g/day green leafy vegetables or fresh f...
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