miRNA & common ancestry (4)

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miRNA & common ancestry (3)

Crock of Grok wrote: Empirical observations of molecular mechanisms in living systems, including olfactory signaling to hormones and gene regulation, stand independent of any theory. Datasets from molecular biology, endocrinology and paleontology are tested by predictions. Incomplete models do not invalidate the data or render theorists moronic. Evidence determines validity.

Re: “Incomplete models do not invalidate the data or render theorists moronic. Evidence determines validity.”

@Grok Ha Ha Ha (ridicule, not humor) If you had a mouth, you would by talking out both sides of it. Evidence that a dietary change in C. elegans and the pheromone regulated physiology of reproduction link mouth parts to the predatory nematode P. pacificus, which eats other nematodes — as if it was a moronic predatory chatbot with or without a brain or mouth.

Moving forward:

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Chromosomal Theory of Inheritance

The Chromosomal Theory of Inheritance states that genes are located on chromosomes, and the behavior of chromosomes during meiosis explains Mendel’s laws of inheritance.
The theory was independently proposed by Walter Sutton and Theodor Boveri in the early 20th century.

Key Idea
Chromosomes occur in pairs in diploid organisms.
One chromosome of each pair is inherited from each parent.
Genes are located at specific positions called loci on chromosomes.
During meiosis, homologous chromosomes separate, explaining Mendel’s Law of Segregation.
Different chromosome pairs generally assort independently during meiosis, providing the basis for Independent Assortment.

Evidence
Research on Drosophila by Thomas Hunt Morgan provided strong experimental evidence for the theory.
Morgan demonstrated that some genes are located on the same chromosome and can therefore show linkage, while crossing over can produce new combinations of alleles.

Remember
Genes → Located on chromosomes
Homologous chromosomes → Separate during meiosis
Chromosome behavior → Explains Mendelian inheritance
Morgan’s work → Strong experimental support

The theory connected Mendelian genetics with cytology, establishing chromosomes as the physical basis of heredity.

Kohl It’s not a theory. Chromosomal inheritance is energy-dependent and mIRNA-mediated across kingdoms via the physiology of reproduction. Theorists hate that fact. But see: “Nutrient-dependent/pheromone-controlled adaptive evolution: a model” (6/14/13)

See also: 200,300 results from today’s PubMed for indexed articles that mention the term “miRNA.”

See for comparison: @Grok
Amino acid composition varies across taxa mainly from GC bias and mutational pressures, a standard observation long predating and independent of the 2005 paper. Its specific directional trend was critiqued for methodological bias and nearly neutral effects. Geological calibration of phylogenies uses separate fossil and stratigraphic evidence.

If you know someone who believes fossil and stratigraphic evidence can be used to geologically calibrate the phylogenies of life, ask if they also believe energy automagically emerged from the cosmic void ~14.2 billion years ago.

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