We concluded that due to the developmental defects in the position of the sinus terminalis and the anterior vitelline veins in the HH13 and HH17 ex ovo embryos, the PGCs fail to find and ingress these blood vessels and therefore remained ectopically in the "germinal crescent" region.
Young adults' developmental position may help to explain some of these findings.
In other cases, the topological features of certain tissues in the network are suggestive of developmental mechanisms, as for the central position of the amygdala within the central nervous system connectome.
Millipedes may also be of developmental utility for understanding the original opening position of the genitalia in arthropods, given the peculiar cephalic location of this opening in this clade, and for understanding neurogenesis across the Arthropoda (e.g., Dove and Stollewerk 2003).
These proteins regulate the position of the neuroblast spindle and the distribution of developmental potential to daughter cells.
Relatedly, the position of the phylotypic stage varies between these two groups of genes: developmental gene expression shows highest conservation at mid-developmental stage, in agreement with the hourglass model while the conservation of housekeeping genes keeps increasing with developmental time.
Arrows indicate the position of the protoconch (larval shell), which can be utilized to determine developmental mode.
To select buds at equivalent developmental stages in the wild-type (WT) and jag-1, we relied on the phyllotactic position of the buds around the inflorescence meristem.
The challenges stem from the fact that B players are blocking key developmental positions, that is, those most useful in developing the skills and experience of a successor or other upwardly-mobile staff.
