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Any developmental process that results in the creation of defined areas or spaces within an organism to which cells respond and eventually are instructed to differentiate. Partitioning the head anlage into a fixed number of segmental units. The number of segments composing the insect head has long been a subject of debate, but it is generally agreed that there are 6 or 7 segments. From anterior to posterior the head segments are the procephalic segments (labral, (ocular), antennal and intercalary) and the gnathal segments (mandibular, maxillary and labial). The regionalization process that divides an organism or part of an organism into a series of semi-repetitive parts, or segments, often arranged along a longitudinal axis. The process whereby segments assume individual identities; exemplified in insects by the actions of the products of the homeotic genes. The specification of the characteristic structures of the intercalary segment of the anterior head, following establishment of segment boundaries. Identity is considered to be the aggregate of characteristics by which a structure is recognized. The specification of the characteristic structures of the head segments following establishment of segment boundaries. Identity is considered to be the aggregate of characteristics by which a structure is recognized. The specification of the characteristic structures of the labial segment following establishment of segment boundaries. Identity is considered to be the aggregate of characteristics by which a structure is recognized. The hierarchical steps resulting in the progressive subdivision of the anterior/posterior axis of the embryo. The specification of the characteristic structures of the mandibular segment following establishment of segment boundaries. Identity is considered to be the aggregate of characteristics by which a structure is recognized. The specification of the characteristic structures of the maxillary segment following establishment of segment boundaries. Identity is considered to be the aggregate of characteristics by which a structure is recognized. The specification of the characteristic structures of the antennal segment following establishment of segment boundaries. Identity is considered to be the aggregate of characteristics by which a structure is recognized.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: specification of segmental identity, head
Acc: GO:0007380
Aspect: Biological Process
Desc: The specification of the characteristic structures of the head segments following establishment of segment boundaries. Identity is considered to be the aggregate of characteristics by which a structure is recognized.
Proteins in PDR annotated with:
   This term: 7 [Search]
   Term or descendants: 21 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0007380 - specification of segmental identity, head (interactive image map)
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