from Wiktionary, Creative Commons Attribution/Share-Alike License
- abbr. homeobox
- v. To hock; to hamstring.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To hock; to hamstring. See hock.
from The Century Dictionary and Cyclopedia
- To hock; hamstring.
- n. The hock.
Sorry, no etymologies found.
It was a triumph of late twentieth-century embryology and genetics to show that insect segmentation and vertebrate segmentation, far from being independent of each other as I was taught, are actually mediated by parallel sets of genes, the so-called hox genes, which are recognizably similar in insects and vertebrates and many other animals, and that the genes are even laid out in the correct serial order in the chromosomes!
It would be interesting to compare the hox genes of these lizards with those of their ancestral lizard species and with their cousins the snakes.
That might tell us a lot more about hox gene regulation than is presently known.
It would be interesting if bio-chemists could test the reaction, combinations, and mutations of say, hox-genes to see when deviations become substantial between different species, phyla.
Exploring ignorance: genetic complexity and the hox genes
Continue reading “Exploring ignorance: genetic complexity and the hox genes”.
Actually, the hox cluster and code studied in this paper appear to be pretty ancient as well.
There's also the weird facet that hox genes are only rudimentary present in cnidarians, making the complexity of wnts even more fascinating.
The hox plan was already sketched out in the grand ancestor of all bilaterally symmetrical animals.
But hox expression is awfully different from gradual successive micromutations, yet both are proposed as mechanisms for creating novel morphology.