model

Behavior (3): All responses are RNA-mediated in bees

See: Honey bees as a model for understanding mechanisms of life history transitions. Excerpt: “In this review we discuss the physiological and genetic mechanisms of this behavioral transition, which include large scale changes in hormonal activity, metabolism, flight ability, circadian rhythms, sensory perception and processing, neural architecture, learning ability, memory and gene expression.” My comment: An earlier review by Eleckonich and Robinson (2000) “Organizational and activational effects of hormones on insect behavior” cited our 1996 review of epigenetically-effected organization and activation…

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RNA-mediated ecological adaptation is not evolution

Prehistoric Critters Change View of Mammal Evolution Three extinct squirrel-like species were identified from Jurassic-era fossils in China. By Molly Sharlach | September 12, 2014 Excerpt 1): “The fossils suggest that the slender animals spent time in trees, and had hands and feet adapted for grabbing branches. Their resemblance to present-day squirrels is a result of convergent evolution, as they belong to a lineage that diverged from that of modern mammals long ago.” My comment: Resemblance in the fossil record…

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Behavior (2): All responses are RNA-mediated not genetically-determined

Diana Maria Petrosanu also asked: “who was the author of the article that had stolen your ideas?“ I cannot recall claiming that anyone had stolen our ideas or my ideas. See: Behavior: The first response is RNA-mediated not genetically-determined. In subsequent published works, I extended what we detailed about the molecular epigenetics of sex differences in cell types from yeasts to mammals via examples from model organisms of RNA-mediated cell type differentiation in different species. That is why I was…

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Behavior: The first response is RNA-mediated not genetically-determined

Diana Maria Petrosanu asked a question in an Evolutionary Psychology News discussion about Evolution’s Random Paths Lead to One Place. I’ve been very vocal in other discussions that tout ridiculous theories that have been repeatedly refuted by biological facts. My answer to her question might help others to understand the language of RNA-mediated events. That’s why I added details to my representation at Combating Evolution to Fight Disease.  Whether or not the addition to my comments is published or understood…

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A relatively young branch of science called epigenetics

Epigenetics: genes, environment and the generation game New research claims that environmental factors affect not just an individual’s genes but those of their offspring too. Diabetes, obesity – even certain phobias – may all be influenced by the behaviour of our forebears by Angela Saini, The Observer, Saturday 6 September 2014 Excerpt 1): “…she was kept on a near-starvation diet when she was close to giving birth.” Excerpt 2: with my emphasis): This puzzling study, published last month, echoes many…

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Comparing divergent model organisms

Comparative analysis of the transcriptome across distant species Excerpt: Overall, our results underscore the importance of comparing divergent model organisms to human to highlight conserved biological principles (and disentangle them from lineage-specific adaptations). My comment: In the detailed comparisons of divergent model organisms portrayed in Nutrient-dependent/pheromone-controlled adaptive evolution: a model, I underscored what is known about cell type differentiation in species from microbes to man. By placing what is known into the context of nutrient-dependent amino acid substitutions and biodiversity…

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The new light of chromosomal rearrangements

SCIENCE Seeing X Chromosomes in a New Light By CARL ZIMMER JAN. 20, 2014 NY TIMES Excerpt 1: In the journal Neuron, a team of scientists has unveiled an unprecedented view of X-chromosome inactivation in the body. They found a remarkable complexity to the pattern in which the chromosomes were switched on and off. My comment: The remarkable complexity of nutrient-dependent pheromone-controlled chromosomal rearrangements that led to difference in sex chromosomes was detailed in our 1996 Hormones and Behavior review article in the section on: Genetic…

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