sex differences

Natural selection for racism and all pathology

Why is natural selection hard to grasp? It is not what you think…. …human cognitive tendencies interfere more with deep understanding of how natural selection works. Simply put, our intelligence and teleological reasoning interferes with the teaching of pseudoscientific nonsense. The nonsense does not place Darwin’s “conditions of life” before natural selection for reproductive fitness. Natural selection is food energy-dependent and pheromone-controlled in the context of biophysically constrained viral latency. See for comparison: The vibrational theory of olfaction for the…

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Polycombic ecological adaptation as a science, not a theory (2)

Evolutionary Constraints in the β-Globin Cluster: The Signature of Purifying Selection at the δ-Globin (HBD) Locus and Its Role in Developmental Gene Regulation Conclusion: … the results here presented indicate that purifying selection is driving not only HBD evolution but also its neighbor pseudogene, HBBP1. In the light of recent advances in the characterization of the β-globin cluster, we propose that the complex patterns of diversity observed in this genomic region arose from distinct functional constraints related with the intricate…

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Chromatin: The structure of DNA (2)

A Genetically Encoded Probe for Live-Cell Imaging of H4K20 Monomethylation Excerpt (with my emphasis): Highlights •    A histone H4K20me1-specific live-cell probe, H4K20me1-mintbody, was developed. •    Dynamics and replication timing of Xi were visualized. •    Critical amino acids for the stability and/or folding of the mintbody were revealed. Reported as: Catching histones by the tail: A new probe to track histone modifications in living cells Excerpt: H4K20me1 is most likely associated with the tight packing of a redundant (inactivated) female X…

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Chromatin: The structure of DNA

Update on Inflammation and Degenerative Brain Disease Excerpt: While mapping connections of neurons has become the holy grail of current neuroscience, it is clear that communication of neurons with many other types cells is, also, vitally important to every aspect of brain function. My comment: Understanding dementia was placed into the context of understanding how virus-driven energy theft alters the de novo creation of olfactory receptor genes and causes the loss of function that is linked to all pathology via…

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How did the innate immune system evolve?

Sexually Antagonistic Male Signals Manipulate Germline and Soma of C. elegans Hermaphrodites Abstract excerpt: Why would a system exist that reduces the vigor of potential mates prior to mating? Addressing this question could provide insights into mechanisms and evolution of sexual conflict and reveal sensory inputs that regulate aging. Highlights excerpt: An unknown signal accelerates larval development, specifically the onset of puberty Reported as: Male chemistry primes females for reproduction—but at a cost “There is a fine balance between reproduction and…

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Plant microRNAs slow virus-driven aging

Six plant extracts delay yeast chronological aging through different signaling pathways The evolutionarily conserved nutrient-sensing signaling pathways that accelerate chronological aging in yeast (Figure 9) are known to stimulate chronological senescence and geroconversion of post-mitotic human cells; these pathways are likely to expedite organismal aging and cancer development in humans [87-93]. There is no experimental evidence of biologically-based cause and effect that starts with the conservation of nutrient-sensing pathways. The nutrient-sensing pathways link the de novo creation of G protein-coupled…

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Antithetical conclusions (4)

Evidence for sex-specific genetic architectures across a spectrum of human complex traits …will need to disentangle whether sex genetic heterogeneity may arise as a consequence of interactions with genetic loci located on the sex chromosomes, differences in gene control due to differences in the sex-specific cellular environment, or more general differences in environmental exposures between the sexes. Nutrient energy-dependent pheromone-controlled sex differences in the cell types of species from yeasts to humans link changes in the microRNA/messenger RNA balance and…

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Anthetical conclusions (2)

From Fertilization to Adult Sexual Behavior (1996) …ribosomal proteins S4X and S4Y (rpS4X, rpS4Y) are produced by sexually dimorphic genes whose protein products are sexually dimorphic. This suggests the possibility of subtle nuances in the ribosomal translation of at least some mRNA, in certain cell types (Fisher et al.,1990; Zinn et al., 1994). Small intranuclear proteins also participate in generating alternative splicing techniques of pre-mRNA and, by this mechanism, contribute to sexual differentiation in at least two species, Drosophila melanogaster…

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Q and A: Energy-dependent cell type differentiation

Richard Lenski and other theorists will not discuss the amount of pseudoscientific nonsense they have included in their ridiculous claims. Rarely does anyone else attempt to unravel their claims in the context of the reports I will cite below, or in other reports that refute ridiculous neo-Darwinian theories. Recently, however, Greg Thurston made an honorable effort to learn about energy-dependent biophysically constrained cause and effect via a series of questions that could be answered with minimal jargon. Q and A…

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Energy dependent RNA-mediated immunity (2)

See also: Energy dependent RNA-mediated immunity (1) Neuroscience of Early-Life Learning in C. elegans See also:  Pan-neuronal imaging in roaming Caenorhabditis elegans Reported as: Watching sensory information translate into behavior “We have long been recording behavior in worms, but we and others have concluded that, if you want to get physiologically relevant neural activity patterns, you have to look at neurons inside a behaving animal,” Samuel explained. “Only in that context are all feedback loops intact, where behavioral output modulates…

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  • What Darwin proved: there’s no such thing as a species
    GENETICS As Animals Mingle, a Baffling Genetic Barrier A short stretch of DNA is challenging what it means to be a species. By: Emily Singer August 5, 2014 Excerpt: “Scientists have dubbed such regions of the genome “islands of speciation.” The persistence of such islands is a phenomenon that has been observed in a variety of […]
  • Randomness and Divine Providence
    A Q&A on randomness and God’s providence …the main goal is to really put together a collection of scholarly studies of these issues: physicists, biologists, […]