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  1.  59
    Holobiont Evolution: Mathematical Model with Vertical Vs. Horizontal Microbiome Transmission.Joan Roughgarden - 2020 - Philosophy, Theory, and Practice in Biology 12 (2).
    A holobiont is a composite organism consisting of a host together with its microbiome, such as a coral with its zooxanthellae. To explain the often intimate integration between hosts and their microbiomes, some investigators contend that selection operates on holobionts as a unit and view the microbiome’s genes as extending the host’s nuclear genome to jointly comprise a hologenome. Because vertical transmission of microbiomes is uncommon, other investigators contend that holobiont selection cannot be effective because a holobiont’s microbiome is an (...)
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  2.  5
    Holobiont Evolution: Mathematical Model with Vertical Vs. Horizontal Microbiome Transmission.Joan Roughgarden - 2020 - Philosophy, Theory, and Practice in Biology 12.
    This paper develops a simple, conceptual, mathematical model for the evolution of holobionts. Its purpose is to clarify how holobiont selection may cause evolutionary change in the traits of holobionts.
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  3.  21
    Fitness and the Twins.Elliott Sober - 2020 - Philosophy, Theory, and Practice in Biology 12.
    Michael Scriven’s example of the identical twins who do unequally well in the project of surviving and reproducing has long occupied a central place in the philosophy of biology literature on fitness and natural selection. In Scriven’s story, you are asked to imagine that the twins have identical genotypes and phenotypes, and live in the same environment. One of them is childless and is killed by lightning, while the other isn’t hit by the lightning and goes on to have some (...)
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  4.  17
    Fitness and the Twins.Elliott Sober - 2020 - Philosophy, Theory, and Practice in Biology 12.
    Michael Scriven’s example of the identical twins who do unequally well in the project of surviving and reproducing has long occupied a central place in the philosophy of biology literature on fitness and natural selection. In Scriven’s story, you are asked to imagine that the twins have identical genotypes and phenotypes, and live in the same environment. One of them is childless and is killed by lightning, while the other isn’t hit by the lightning and goes on to have some (...)
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