“…it was only recently (the past 15 years or so) that scientists discovered that a basic set of the same proteins and mRNAs are involved in all of embryogenesis.”
This ignores what we described nearly 18 years ago in the Molecular Epigenetics section of our 1996 review. This is HOW cell type differentiation occurs: “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 and Caenorhabditis elegans…”
It is not likely that cell type differentiation in any cell of any tissue of any organ of any organism occurs any other way. It is likely that the biophysically-constrained molecular mechanisms of cell type differentiation are conserved. Nevertheless, the anonymous fools among us would like you to think that ‘cell fate determination’ is the same as nutrient-dependent pheromone-controlled ‘cell type differentiation’.
If the anonymous fools among us would attempt to discuss the difference between cell type differentiation and cell fate determination, pseudoscientists might realize why they are not like serious scientists.
Simply put, pseudoscientists know nothing about how cell type differentiation occurs. That’s why they claim cell fate is determined by mutations and/or natural selection. That claim makes it seem as if the evolution of biodiversity somehow automagically occurs, and pseudoscientists simply accept that ridiculous claim. Most do not realize it is meaningless and they continue to meaningfully interpret their results in the terms of theories about cell fate determination, when the facts about cell type differentiation are perfectly clear to serious scientists.
“…the so-called alpha chains of hemoglobin have identical sequences of amino acids in man and the chimpanzee, but they differ in a single amino acid (out of 141) in the gorilla.”
Nutrient-dependent single amino acid substitutions, which are pheromone-controlled via the physiology of reproduction, are responsible for all cell type determination. Thus, Wiki-knowledge is no substitute for understanding biologically-based cause and effect. It is only used when anonymous fools try to suggest to others that they are not fools who continue to believe in ridiculous theories about cell fate determination more than 17 years after the facts about cell type differentiation were detailed in our Hormones and Behavior review. See also: “Reproductive isolation evidently can arise with little or no morphological differentiation.” (p. 665) — Dobzhansky (1972)