Tag Archive: chromatin

The biologically-based origin of the mammalian placenta (2)

The past is not the key to the present

See also: The biologically-based origin of the mammalian placenta I’ll preface this follow-up on the origins of the mammalian placenta with comments that attest to foolishness of theoretical physicists who try to link Big Bang cosmology to neo-Darwinian theories about…
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De novo DNA methylation?

terrarium eco system

Epigenomics and the control of fate, form and function in social insects Excerpt: “De novo DNA methylation is critical for developmental divergence of female larvae towards the honeybee worker caste and is progressive [49,51].” de novo is a Latin expression…
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De novo gene Creation sans evolution of genes via mutations

human-evolution

Where do genes come from? – Carl Zimmer The pseudoscientific nonsense touted in this video has been refuted by decades of experimental evidence. The experimental evidence links RNA-directed DNA methylation from nutrient-dependent amino acid substitutions to the de novo Creation…
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Nutrient-dependent chromatin organization?

Snf2h-mediated chromatin organization and histone H1 dynamics govern cerebellar morphogenesis and neural maturation open access Conclusion: “…delineating the epigenetic regulation of neuronal development is crucial to our understanding of intellectual-disability disorders caused by mutations in epigenetic modifying enzymes. As a whole,…
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Evolution: innovations may have non-adaptive origins (sans mutations)

neuronal-plasticity

Q & A: Evolution Makes Do By Chris Palmer Evolutionary biologist Andreas Wagner argues that many evolutionary innovations may have non-adaptive origins. Excerpt: “If exaptations are pervasive, then natural selection—which few doubt is critical for the preservation and spreading of…
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Pheromones and cancer

diseases-disorders

Transcription Factor-MicroRNA-Target Gene Networks Associated with Ovarian Cancer Survival and Recurrence Excerpt: “MicroRNAs (miRNAs) are small, non-coding RNA molecules that bind to complementary sequences on target mRNA transcripts, and thus, regulate gene expression at the post-transcription stage. Transcription factors (TFs)…
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Epigenetic effects on chromatin and regulatation of gene expression (in Archaea?)

the bottom-up epigenetic effects of nutrient chemicals on speciation that are concurrently controlled by the top-down epigenetic effects of pheromones on reproduction challenges those who might rather attempt to-explain away the conserved molecular biology of adaptive evolution via random mutations theory

Epigenetic effects of viruses on cellular homeostasis

rp_poster-from-jesse.jpg

control of homeostasis by the epigenetic effects of proper nutrition and social stress inhibition might prevent our diet-driven and social stress-driven extinction.

Human pheromone- and nutrient-dependent brain development and behavior

terrarium eco system

…model organisms make clear the extension of the concept to nutrient chemical and pheromone-dependent neurogenic niches, human brain development, and individual differences in behavior.