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Definition
| spatial arrangement of different regions of the body |
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Definition
| signals received by cell that cause it to become the appropriate cell type based on its position relative to the other cells |
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Definition
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Definition
| molecule that conveys positional information and promotes developmental changes over time |
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Definition
| process by which cell(s) governs the developmental fate of neighboring cells |
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Definition
| cells' ability to attach to other cells and the cellular matrix to transmit information |
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Term
| cell adhesion molecules (CAMs) |
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Definition
| surface receptors generated by the cell to make contact with other cells |
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Definition
| gene that plays central role in specifying final identity of body region; mutations result in wrong body part in a location |
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Definition
| animals exhibiting a left-right symmetry (anteriorpoterior and dorsalventral axes) |
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Term
| formation of body axes, segmentation of body, determination of structures, cell differentiation |
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Definition
| 4 developmental stages of bilaterians |
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Term
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Definition
| groups of cells becoming destined to develop into particular structures/types |
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Term
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Definition
| model organism for invertebrate bilaterian development |
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Term
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Definition
| cell most critical in determining the pattern of development in the adult organism; has preestablished axes |
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Term
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Definition
| formed after fertilization and early nuclear division; a sheet of cells on the outside with the yolk in the center |
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Definition
| form at posterior end of blastoderm; germ cells that eventually become gametes in adult organism |
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Definition
| stage of embryonic development where cells divide into ectoderm, mesoderm, and endoderm |
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Term
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Definition
| 14 transient subdivisions in the embryo where gene expression is controlled spatially |
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Term
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Definition
| after parasegments disappear, morphologically distinct divisions appear |
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Term
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Definition
| formation and segmentation of the embryo |
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Term
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Definition
| post-hatching developmental stage, takes place in pupa |
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Definition
| cells present in larva that differentiate during metamorphosis into distinct structures in the adult fly |
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Definition
| head to tail (quadrapeds) |
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Definition
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Definition
| usually for designating limb parts; near to far |
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Term
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Definition
| occurs relative to anteroposterior axis, depending on stature of animal |
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Term
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Definition
| in female Drosophila, gene products are transferred from these cells to oocytes via cytoplasmic bridges |
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Term
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Definition
| gap, pair-ruled, and segment polarity genes that cause particular regions of the embryo to become segmented in particular ways |
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Term
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Definition
| genes expressed after fertilization |
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Term
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Definition
| ultimate morphological features that a cell adopts |
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Term
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Definition
| mutants in which one body part is replaced by another (ie a leg on the head instead of antenna) |
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Term
| gain-of-function mutation |
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Definition
| mutation that results in the addition of qualities, like the Antennapedia mutation |
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Term
| loss-of-function mutation |
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Definition
| a mutation that deletes or renders inert a particular structure |
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Term
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Definition
| coding sequence of homeotic genes with a 180bp consensus sequence that codes for transcription factors |
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Term
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Definition
| protein domain encoded by a particular homeobox, usually a transcription factor |
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Definition
| method of presenting cell division as it progresses |
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