The process involved in the specification of cell identity. Once specification has taken place, a cell will be committed to differentiate down a specific pathway if left in its normal environment.

The cell fate determination process that results in a cell becoming becomes capable of differentiating autonomously into an ectoderm cell in an environment that is neutral with respect to the developmental pathway; upon specification, the cell fate can be reversed.

The cell fate determination process that results in a cell becoming becomes capable of differentiating autonomously into an ectoderm cell in an environment that is neutral with respect to the developmental pathway; upon specification, the cell fate can be reversed.

The morphogenetic process in which the anatomical structures of the compound eye are generated and organized. The adult compound eye is a precise assembly of 700-800 ommatidia. Each ommatidium is composed of 20 cells, identified by cell type and position. An example of compound eye morphogenesis is found in Drosophila melanogaster.

The morphogenetic process in which the anatomical structures of the compound eye are generated and organized. The adult compound eye is a precise assembly of 700-800 ommatidia. Each ommatidium is composed of 20 cells, identified by cell type and position. An example of compound eye morphogenesis is found in Drosophila melanogaster.

The process whose specific outcome is the progression of an immature germ cell over time, from its formation to the mature structure (gamete). A germ cell is any reproductive cell in a multicellular organism.

The construction of a chorion-containing eggshell. An example of this is found in Drosophila melanogaster.

Polarization of the oocyte along the dorsal-ventral axis, by a gene product encoded by somatic cells. An example of this is found in Drosophila melanogaster.

The specification of the dorsal/ventral axis of the embryo, through the products of genes expressed in the zygote.

The specification of the dorsal/ventral axis of the embryo, through the products of genes expressed in the zygote.

Formation of the amnioserosa, an epithelium that occupies a hole in the embryonic dorsal epidermis. This occurs by the transformation of a narrow strip of cells at the dorsal midline of the blastoderm from columnar to squamous cells, accompanied by a lateral shift.

Formation of the amnioserosa, an epithelium that occupies a hole in the embryonic dorsal epidermis. This occurs by the transformation of a narrow strip of cells at the dorsal midline of the blastoderm from columnar to squamous cells, accompanied by a lateral shift.

Formation of the amnioserosa, an epithelium that occupies a hole in the embryonic dorsal epidermis. This occurs by the transformation of a narrow strip of cells at the dorsal midline of the blastoderm from columnar to squamous cells, accompanied by a lateral shift.

The process during Drosophila embryogenesis whereby the ectodermal cells of the lateral epithelium stretch in a coordinated fashion to internalize the amnioserosa cells and close the embryo dorsally.

The process during Drosophila embryogenesis whereby the ectodermal cells of the lateral epithelium stretch in a coordinated fashion to internalize the amnioserosa cells and close the embryo dorsally.

The cell fate determination process in which a cell within the dorsal ectoderm becomes capable of differentiating autonomously into a leading edge cell regardless of its environment; upon determination, the cell fate cannot be reversed.

The process whose specific outcome is the progression of the ectoderm over time, from its formation to the mature structure. In animal embryos, the ectoderm is the outer germ layer of the embryo, formed during gastrulation.

The process whose specific outcome is the progression of sensory organs over time, from its formation to the mature structure.

The process whose specific outcome is the progression of an open tracheal system over time, from its formation to the mature structure. An open tracheal system is a respiratory system, a branched network of epithelial tubes that supplies oxygen to target tissues via spiracles. An example of this is found in Drosophila melanogaster.

The process whose specific outcome is the progression of an open tracheal system over time, from its formation to the mature structure. An open tracheal system is a respiratory system, a branched network of epithelial tubes that supplies oxygen to target tissues via spiracles. An example of this is found in Drosophila melanogaster.

The orderly movement of epithelial cells during development of an open tracheal system. An example of this is found in Drosophila melanogaster.

The orderly movement of epithelial cells during development of an open tracheal system. An example of this is found in Drosophila melanogaster.

The process in which the anatomical structures of the foregut are generated and organized.

The process in which the anatomical structures of the hindgut are generated and organized.

The process in which the anatomical structures of the hindgut are generated and organized.

The process in which the anatomical structures of the Malpighian tubule are generated and organized. This process takes place entirely during the embryonic phase. A Malpighian tubule is a fine, thin-walled excretory tubule in insects which leads into the posterior part of the gut.

The process whose specific outcome is the progression of the imaginal disc over time, from its formation to the metamorphosis to form adult structures. Imaginal discs are epithelial infoldings in the larvae of holometabolous insects that develop into adult structures (legs, antennae, wings, etc.).

The process whose specific outcome is the progression of the imaginal disc over time, from its formation to the metamorphosis to form adult structures. Imaginal discs are epithelial infoldings in the larvae of holometabolous insects that develop into adult structures (legs, antennae, wings, etc.).

The increase in mass of imaginal discs by cell proliferation prior to metamorphosis. Imaginal discs are epithelial infoldings in the larvae of holometabolous insects that develop into adult structures (legs, antennae, wings, etc.) during metamorphosis from larval to adult form.

The regionalization process that results in defined areas of the imaginal disc that will undergo specific cell differentaiton. Imaginal discs are epithelial infoldings in the larvae of holometabolous insects that develop into adult appendages (legs, antennae, wings, etc.) during metamorphosis from larval to adult form.

The process in which the anatomical structures derived from the eye-antennal disc are generated and organized. This includes the transformation of an eye-antennal imaginal disc from a monolayered epithelium in the larvae of holometabolous insects into recognizable adult structures including the eye, antenna, head capsule and maxillary palps.

The morphogenetic furrow is a dorsoventral indentation which sweeps anteriorly across the eye disc. Ommatidia begin to form along the furrow, resulting in a graded series of ommatidial development across the anterior/posterior axis of the disc.

The morphogenetic furrow is a dorsoventral indentation which sweeps anteriorly across the eye disc. Ommatidia begin to form along the furrow, resulting in a graded series of ommatidial development across the anterior/posterior axis of the disc.

The establishment, maintenance and elaboration of the proximal/distal axis of the wing disc, a precursor to the adult wing.

The regionalization process in which the area of a imaginal disc-derived wing that will form a wing vein is specified.

The regionalization process in which the area of a imaginal disc-derived wing that will form a wing vein is specified.

The process in which the anatomical structures of the imaginal disc-derived wing are generated and organized. The wing is an appendage modified for flying.

The process in which the anatomical structures of the imaginal disc-derived wing are generated and organized. The wing is an appendage modified for flying.

The establishment, maintenance and elaboration of the proximal/distal axis of the leg imaginal disc, a precursor to the adult leg.

The establishment, maintenance and elaboration of the proximal/distal axis of the leg imaginal disc, a precursor to the adult leg.

The process whose specific outcome is the progression of the mesoderm over time, from its formation to the mature structure. The mesoderm is the middle germ layer that develops into muscle, bone, cartilage, blood and connective tissue.

The process whose specific outcome is the progression of the mesoderm over time, from its formation to the mature structure. The mesoderm is the middle germ layer that develops into muscle, bone, cartilage, blood and connective tissue.

The process whose specific outcome is the progression of the mesoderm over time, from its formation to the mature structure. The mesoderm is the middle germ layer that develops into muscle, bone, cartilage, blood and connective tissue.

The process whose specific outcome is the progression of the heart over time, from its formation to the mature structure. The heart is a hollow, muscular organ, which, by contracting rhythmically, keeps up the circulation of the blood.

The process whose specific outcome is the progression of the heart over time, from its formation to the mature structure. The heart is a hollow, muscular organ, which, by contracting rhythmically, keeps up the circulation of the blood.

The process whose specific outcome is the progression of the hemocyte over time, from its formation to the mature structure. Hemocytes are blood cells associated with a hemocoel (the cavity containing most of the major organs of the arthropod body) which are involved in defense and clotting of hemolymph, but not involved in transport of oxygen.

The orderly movement of a cell specialized to produce haploid gametes through the embryo from its site of production to the place where the gonads will form.

Any process that modulates the surface configuration of a cell.

The process in which anatomical structures of the veins on an imaginal disc-derived wing are generated and organized.

The establishment, maintenance and elaboration of the anterior/posterior axis. The anterior-posterior axis is defined by a line that runs from the head or mouth of an organism to the tail or opposite end of the organism.

The establishment, maintenance and elaboration of the dorsal/ventral axis. The dorsal/ventral axis is defined by a line that runs orthogonal to both the anterior/posterior and left/right axes. The dorsal end is defined by the upper or back side of an organism. The ventral end is defined by the lower or front side of an organism.

The regionalization process in which the areas along the dorsal/ventral axis are established that will lead to differences in cell differentiation. The dorsal/ventral axis is defined by a line that runs orthogonal to both the anterior/posterior and left/right axes. The dorsal end is defined by the upper or back side of an organism. The ventral end is defined by the lower or front side of an organism.

The regionalization process in which the areas along the dorsal/ventral axis are established that will lead to differences in cell differentiation. The dorsal/ventral axis is defined by a line that runs orthogonal to both the anterior/posterior and left/right axes. The dorsal end is defined by the upper or back side of an organism. The ventral end is defined by the lower or front side of an organism.

The process in which a relatively unspecialized mesodermal cell acquires the specialized structural and/or functional features of a cardioblast. A cardioblast is a cardiac precursor cell. It is a cell that has been committed to a cardiac fate, but will undergo more cell division rather than terminally differentiating.

Any process that increases the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product or products (proteins or RNA). This includes the production of an RNA transcript as well as any processing to produce a mature RNA product or an mRNA or circRNA (for protein-coding genes) and the translation of that mRNA or circRNA into protein. Protein maturation is included when required to form an active form of a product from an inactive precursor form.

Any process that decreases the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product or products (proteins or RNA). This includes the production of an RNA transcript as well as any processing to produce a mature RNA product or an mRNA or circRNA (for protein-coding genes) and the translation of that mRNA or circRNA into protein. Protein maturation is included when required to form an active form of a product from an inactive precursor form.

A series of molecular signals initiated by the binding of a member of the BMP (bone morphogenetic protein) family to a receptor on the surface of a target cell, and ending with regulation of a downstream cellular process, e.g. transcription.

A series of molecular signals initiated by the binding of a member of the BMP (bone morphogenetic protein) family to a receptor on the surface of a target cell, and ending with regulation of a downstream cellular process, e.g. transcription.

A series of molecular signals initiated by the binding of a member of the BMP (bone morphogenetic protein) family to a receptor on the surface of a target cell, and ending with regulation of a downstream cellular process, e.g. transcription.

The process that occurs during oogenesis involving the ovarian follicle cells, somatic cells which surround the germ cells of an ovary. An example of this is found in Drosophila melanogaster.

The process that occurs during oogenesis involving the ovarian follicle cells, somatic cells which surround the germ cells of an ovary. An example of this is found in Drosophila melanogaster.

Any process by which an organism or tissue maintains a population of germ-line stem cells.

A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of the spectrosome, a germline specific spherical organelle that is the precursor to the fusome.

The process in which a cell becomes capable of differentiating autonomously into a fusion cell in an environment that is neutral with respect to the developmental pathway; upon specification, the cell fate can be reversed. Fusion cells allow the interconnection of adjacent tracheal metameres during tracheal tube fusion.

Ensuring that a tube in an open tracheal system is of the correct diameter. When primary branches form their lumens are small (less than 2 micrometers) in caliber and must undergo regulated expansion during larval life to reach their mature size.

The process in which a relatively unspecialized cell derived from the larval lymph gland acquires the specialized features of a mature hemocyte. The lymph gland consists of three to six bilaterally paired lobes that are attached to the cardioblasts during larval stages, and it degenerates during pupal stages. Hemocytes are blood cells associated with a hemocoel (the cavity containing most of the major organs of the arthropod body) which are involved in defense and clotting of hemolymph, but not involved in transport of oxygen. An example of this process is found in Drosophila melanogaster.

Progression of the eye-antennal imaginal disc over time, from its initial formation through to its metamorphosis to form adult structures including the eye, antenna, head capsule and maxillary palps.

Progression of the genital imaginal disc over time, from its initial formation through to its metamorphosis to form the adult terminalia, comprising the entire set of internal and external genitalia and analia. Both sexes of Drosophila have a single genital disc formed from the female and male genital primordia, and the anal primordium. The anal primordium develops in both sexes, forming either male or female analia. However, only one of the genital primordia develops in each sex, forming either the male or the female genitalia.

Progression of the genital imaginal disc over time, from its initial formation through to its metamorphosis to form the adult terminalia, comprising the entire set of internal and external genitalia and analia. Both sexes of Drosophila have a single genital disc formed from the female and male genital primordia, and the anal primordium. The anal primordium develops in both sexes, forming either male or female analia. However, only one of the genital primordia develops in each sex, forming either the male or the female genitalia.

Progression of the labial imaginal disc over time, from its initial formation through to its metamorphosis to form adult structures including parts of the proboscis.

The process giving rise to the pattern of cell differentiation in the wing imaginal disc.

The process giving rise to the pattern of cell differentiation in the wing imaginal disc.

The establishment, maintenance and elaboration of the anterior/posterior axis of the genital disc. An anterior and posterior compartment form in each of the three genital disc primoridia (the female genital disc primordium, the male genital disc primordium and the anal primordium).

The sex-specific patterns of primoridia growth and differentiation in the genital imaginal disc. The anal primordium of the genital disc develops in both sexes, but depending on the genetic sex gives rise to either male or female analia. Depending on the genetic sex, only one of the two genital primordia develop. In females the female genital primordium develops and gives rise to the female genitalia whereas the male primordium is repressed. Conversely, in males the male genital primordium develops and gives rise to the male genitalia whereas the female genital primordium is repressed.

The regionalization process that subdivides the wing imaginal disc into the wing and notum (body wall) subfields, thus determining whether cells ultimately differentiate wing or notum-specific structures.

The process by which an organism or tissue maintains a population of male germ-line stem cells.

The process by which an organism or tissue maintains a population of female germ-line stem cells.

The self-renewing division of a germline stem cell to produce a daughter stem cell and a daughter germ cell, which will divide to form the gametes.

Any process that modulates the frequency, rate or extent of cell proliferation.

The process in which a cell becomes capable of differentiating autonomously into an R8 cell in an environment that is neutral with respect to the developmental pathway; upon specification, the cell fate can be reversed.

Any apoptotic process in a nurse cell. During late oogenesis, following the transfer of substances from the nurse cells to the oocyte, nurse cell remnants are cleared from the egg chamber by apoptotic process.

Any process that modulates the frequency, rate or extent of the growth of the imaginal disc.

Any process that activates or increases the frequency, rate or extent of imaginal disc growth.

Any process that modulates the frequency, rate or extent of cell differentiation, the process in which relatively unspecialized cells acquire specialized structural and functional features.

Any process that stops, prevents, or reduces the frequency, rate or extent of salivary gland determination.

Establishment of the dorsal filaments, elaborate specializations of the chorion that protrude from the anterior end of the egg and facilitate embryonic respiration.

The developmental process that results in the deposition of coloring matter in an organism, tissue or cell.

The establishment, maintenance and elaboration of the anterior/posterior axis of the wing disc, a precursor to the wing.

The process whose specific outcome is the progression of the lymph gland over time, from its formation to the mature structure. The lymph gland is one of the sites of hemocyte differentiation. It consists of three to six bilaterally paired lobes that are attached to the cardioblasts during larval stages, and it degenerates during pupal stages.

The process in which the anatomical structures of the hindgut are generated and organized, during the embryonic phase.

Any process that activates, maintains or increases the rate of muscle development.

The process in which the anatomical structures of the head are generated and organized. The head is the anterior-most division of the body.

Any process that increases the rate, frequency or extent of SMAD protein signal transduction. Pathway-restricted SMAD proteins and common-partner SMAD proteins are involved in the transforming growth factor beta receptor signaling pathways.

The process in which a relatively unspecialized cell acquires the specialized structural and/or functional features of a pericardial nephrocyte. A pericardial nephrocyte is an insect renal cell that filters hemolymph and is found with other pericardial nephrocytes in two rows flanking the dorsal vessel. Differentiation includes the processes involved in commitment of a cell to a specific fate and its subsequent development to the mature state.

The process whose specific outcome is the progression of the anterior Malpighian tubule over time, from its formation to the mature structure. The pair of anterior tubules arise from a dorsal region of the embryonic hindgut and projects forwards through the body cavity. A Malpighian tubule is a fine, thin-walled excretory tubule in insects which connects with the posterior part of the gut.

The directed movement of the outgrowing Malpighian tubule guided by specific chemical cues/signals. Movement may be towards a guidance cue (positive chemotaxis) or away from it (negative chemotaxis). Guidance contributes to the final positioning of the tubule.

That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid.

The area of a motile cell closest to the direction of movement.

The volume enclosed by the dense core granule membrane.