Genetic conflict and sex chromosome evolution game in Little Rock

Song R, et al. Jordan CY, Charlesworth D The potential for sexually antagonistic polymorphism in different genome regions. Sex determination in model species suggests that a master-switch gene e. EMBO Rep — Sex chromosome meiotic drive. Abstract The canonical model of sex-chromosome evolution predicts that, as recombination is suppressed along sex chromosomes, gametologs will progressively differentiate, eventually becoming heteromorphic.

Meiotic drive also called segregation distortion : a system in which genetic elements termed segregation distorters bias the proportion of gametes that carry them, resulting in over- or under-representation of one gametic type i.

However, there are numerous examples of homomorphic sex chromosomes across the tree of life. Discovery of the youngest sex chromosomes reveals first case of convergent co-option of ancestral autosomes in turtles. Veller, C. Due to the ambiguous state at the root of the tree, the number and placement of these turnovers is unclear.

Sequential, divergent, and cooperative requirements of Foxl2a and Foxl2b in ovary development and maintenance of zebrafish. A resulting antagonistic coevolution has led to fascinating behaviors in both sexes, and their convergent evolution provides ideal conditions to study the evolution of extreme mating strategies Schneider Genetic conflict and sex chromosome evolution game in Little Rock evidence against meiotic-drive models of hybrid sterility.

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Sperm is produced in paired testes inside the opisthosoma but transferred and stored until mating in specific organs at the tips of the male pedipalps. USAE—62 Sex chromosomes and segregation distortion Segregation distorters can arise on all chromosomes, but are particularly important in species with chromosomal sex determination for brevity, we will refer to the heterogametic sex as male and the sex chromosomes as X and Y, except where we explicitly compare XY and ZW systems.

Nucleic Acids Res e We show here that recruitment departs significantly from random expectations in true frogs. BMC Biol.

  • The Erythrinidae family Teleostei: Characiformes is a small Neotropical fish group with a wide distribution throughout South America, where Hoplias malabaricus corresponds to the most widespread and cytogenetically studied taxon.
  • In modern day mammals sex is determined by the Y chromosome.

Schneider, Gabriele Uhl and Nico Posnien contributed equally to this work. Sex chromosome turnovers and genetic drift: a simulation study. Haczkiewicz, K. Sutherland, B. The mouse X chromosome is enriched for multicopy testis genes showing postmeiotic expression.

Int J Plant Sci —

Genetic conflict and sex chromosome evolution game in Little Rock

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  • Genetic conflict and sex chromosome evolution Colin D. Meiklejohn1 and Yun Tao2 1Department of Biology, University of Rochester, Rochester, NY , USA 2Department of Biology, Emory University, Atlanta, GA , USA Chromosomal sex determination systems create the opportunity for theevolutionof selfishgenetic elements. Chromosomal sex determination systems create the opportunity for the evolution of selfish genetic elements that increase the transmission of one sex chromosome at the expense of its homolog. Because such selfish elements on sex chromosomes can reduce fertility and distort the sex ratio of progeny, unlinked suppressors are expected to evolve, bringing different regions of the genome into Cited by:
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  • This explains why all characterized autosomal distorters are found in regions with little or no recombination, such as inversions [7]. Most X and Y. Chromosomal sex determination systems create the opportunity for the evolution of selfish genetic elements that increase the transmission of.
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  • genetic conflict over sex chromosome transmission is an important evolutionary force that has shaped a wide range of seemingly disparate phenomena including the epigenetic regulation of genes expressed in the germline, the distribution of genes in the genome, and the evolution of hybrid sterility between species. Selfish genes and genetic conflictCited by: The genetics of sex chromosomes: evolution and implications for hybrid incompatibility. Johnson NA(1), Lachance J. Author information: (1)Department of Plant, Soil, and Insect Sciences, and Graduate Program in Organismic and Evolutionary Biology, University of Massachusetts-Amherst, Amherst, Massachusetts , USA. [email protected] by:
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