(A) The de novo inactivation model requires many rounds of inactivation and reactivation: the paternal germline initiates meiotic sex-chromosome inactivation, but the X chromosome is completely ...

One of Darwin's contemporaries, German biologist Ernst Haeckel, summed up the argument in a famous, pithy statement: "Ontogeny recapitulates phylogeny.'' That is to say, in the process of ...

et al. "A Juvenile Tuarangisaurus Keyesi Wiffen and Moisley 1986 (Plesiosauria, Elasmosauridae) from the Upper Cretaceous of New Zealand, with Remarks on Its Skull Ontogeny." Cretaceous Research ...

The time of fertilization represents the starting point in the life history, or ontogeny, of the individual." [Carlson, Bruce M. Patten's Foundations of Embryology. 6th edition. New York: McGraw-Hill, ...

Overviews of ontogeny by taxon and anatomical region for numerous species supplement excellent anatomical studies. The volume couples careful and detailed description with insightful evolutionary and ...

American Zoologist 40, 748-758 (2000). Gould, S. J. Allometry and Size in Ontogeny and Phylogeny. Biological Review of the Cambridge Philosophical Society 41, 587 (1966). Gould, S. J. Geometric ...

The gray squirrel’s appearance differs seasonally. The yellowish brown summer coat becomes thicker and gray in winter, the pelage of some individuals strikingly silver-gray. Underparts and eye-rings ...

Wright, April Wagner, Peter J. and Wright, David F. 2021. Testing Character Evolution Models in Phylogenetic Paleobiology.

in collaboration with Prof Derek Siveter from the University of Oxford investigating the co-occurrence of gigantic trilobites in early Ordovician strata in Morocco systematics of paradoxidids ...

Physical cues in the womb, and not just genetics, influence the normal development of neural crest cells, the embryonic stem cells that form facial features, finds a new study led by UCL researchers.

Fortunately, most lesions are detected early and surgically removed, accounting for disease’s high survival rates. Importantly, ontogeny of epidermal SCC parallels cancers associated with high ...

The time of fertilization represents the starting point in the life history, or ontogeny, of the individual." [Carlson, Bruce M. Patten's Foundations of Embryology. 6th edition. New York: McGraw-Hill, ...