linkedin post 2016-06-04 05:53:33

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PLANTS. "Currently, it is unclear whether the evolution of reproductive isolating barriers is under simple genetic control or due to more complex additive and/or epistatic control, involves loci of major or minor effect, and whether genetic architecture is dependent on the type of reproductive isolating barrier." https://lnkd.in/eGmuRdp View in LinkedIn
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linkedin post 2016-06-04 05:47:24

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PRION EPIGENETIC SWITCH. "The mammalian prion species barrier, which prevents the spread of scrapie and bovine spongiform encephalopathy to man, has been the focus of intense research efforts. Our data show that for the yeast [PSI+] prion, the species barrier results from a remarkable specificity in interaction between the prion protein itself, mediated by a well-defined epitope in the PrD. Because prion domains are modular, fusion to prion domains could potentially allow prion-based regulation of a broad range of proteins." https://lnkd.in/ebZGb4M View in LinkedIn
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linkedin post 2016-06-04 05:36:09

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POLYPLOIDY LEADS TO HYBRIDS. "In plants, new, reproductively isolated species may arise instantaneously, due to multiplication of the entire complement of chromosomes by a process known as polyploidy. This may occur as a result of hybridization, combining the chromosome sets from two parent species in a hybrid individual. If such hybrids turn out to be well adapted to environmental conditions, hybridization is a mechanism that produces new species." https://lnkd.in/ejwXt8N View in LinkedIn
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linkedin post 2016-06-04 05:32:59

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HOST RANGE. "Many infectious diseases cross the species barrier. Generally, this crossing occurs either because humans come into contact with a microorganism that is already capable of causing human infection or because an alteration occurs in the spectrum of species for which the organism is pathogenic — the so-called host range." https://lnkd.in/enTxJtp View in LinkedIn
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