linkedin post 2018-01-09 06:24:51

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HOTSPOTS. "The localisation of recombination events differs between species. In many species, recombination occurs in localised regions known as “recombination hotspots” of around 1-2kb in length, although some species (e.g., C. elegans and Drosophila) lack well-defined hotspots." http://biorxiv.org/content/biorxiv/early/2016/04/28/050831.full.pdf View in LinkedIn
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linkedin post 2018-01-09 06:22:36

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ANIMALS VS PLANTS. "Models point to a role of sex differences in selection during the haploid phase. Whilst a viable explanation in plants, there is little empirical support for this in animals, in which meiosis in females is only completed after fertilisation, so there is no true haploid phase, and the small number of expressed genes in sperm." http://biorxiv.org/content/biorxiv/early/2016/04/28/050831.full.pdf View in LinkedIn
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linkedin post 2018-01-09 06:20:52

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UNEQUAL RECOMBINATION. "More intriguing are the quantitative differences between males and females, known as heterochiasmy, which are found in many taxa, but whose mechanistic and evolutionary drivers are not yet fully understood." http://biorxiv.org/content/biorxiv/early/2016/04/28/050831.full.pdf View in LinkedIn
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linkedin post 2018-01-09 06:19:04

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EXTREME CASE. "In many species, cross-over rates and localisation differ between male and female meioses, and can differ in degree and direction even between closely related species. The most extreme case is achiasmy, an absence of recombination in one sex, nearly always the heterogametic sex. This may have evolved either as a side effect of selection to suppress recombination between the sex chromosomes." http://biorxiv.org/content/biorxiv/early/2016/04/28/050831.full.pdf View in LinkedIn
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linkedin post 2018-01-08 14:14:04

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NON-RANDOM CROSSOVERS. "Crossover interference, where a cross-over in one position strongly reduces the likelihood of another cross-over occurring in the vicinity and/or on the same bivalent, meaning that the distribution of multiple cross-overs are non-random, is widespread" https://lnkd.in/e2tp_G5 View in LinkedIn
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linkedin post 2018-01-08 14:11:29

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PARENT-OFFSPRING CONFLICTS. "Parents make decisions of allocations to offspring before the "meiotic veil of ignorance", whereas offspring compete for resources “from behind the veil”. These parent-offspring conflicts are likely at the origin of parental imprints that occur on some genes at or just before meiosis." http://biorxiv.org/content/biorxiv/early/2016/04/28/050831.full.pdf View in LinkedIn
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linkedin post 2018-01-08 14:09:21

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GAMING TRANSPOSONS. "The second class of selfish genetic elements consists of meiotic drivers that exploit the asymmetry of female meiosis. These elements achieve transmission in excess of 50% by preferentially moving into the meiotic products that will eventually become the eggs or megaspores." http://biorxiv.org/content/biorxiv/early/2016/04/28/050831.full.pdf View in LinkedIn
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linkedin post 2018-01-08 14:06:30

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CHEATING TRANSPOSONS. "These selfish genetic elements fall into two classes. Killer selfish genetic elements kill cells that have not inherited the element. In principle, such killers could operate during meiosis (the hypothetical ‘sister killers’ as discussed above), but the numerous killer selfish genetic elements that have so far been described operate postmeiotically, e.g. by killing sibling sperm." https://lnkd.in/e2tp_G5 View in LinkedIn
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