What is competence in developmental biology?
Competence is a term which sums up the ability of the enzyme complement of the embryonic cell to adopt to a particular ratio of metabolites.
What is induction and competence?
(1) The optic vesicle is able to induce lenses in the anterior portion of the ectoderm, but not in the presumptive trunk and abdomen (2). If the optic vesicle is (more…) This ability to respond to a specific inductive signal is called competence (Waddington 1940).
What is neural competence?
The ability of a tissue to respond to induction, termed its competence, is often critical in determining both the timing of inductive interactions and the extent of induced tissue. Thus, at least from the beginning of gastrulation onwards, changes in competence occur autonomously within ectoderm.
What is competence in zoology?
In microbiology, genetics, cell biology, and molecular biology, competence is the ability of a cell to alter its genetics by taking up extracellular (“naked”) DNA from its environment in the process called transformation. Competence allows for rapid adaptation and DNA repair of the cell.
What is the role of morphogens in development?
Morphogens are substances that establish a graded distribution and elicit distinct cellular responses in a dose dependent manner. They function to provide individual cells within a field with positional information, which is interpreted to give rise to spatial patterns.
What is the difference between dedifferentiation and transdifferentiation?
During dedifferentiation, a terminally differentiated cell reverts back to a less-differentiated stage from within its own lineage, which allows it to proliferate. Transdifferentiation sees cells regress to a point when they can switch lineages or can also occur directly between two different cell types.
What is induction in developmental biology?
induction, in embryology, process by which the presence of one tissue influences the development of others. The converse is often true as well; i.e., the addition of extra inducing tissue in an abnormal position in an embryo often results in aberrantly located induced tissue.
What is the definition of induction in biology?
Induction. The act or process of inducing or causing to occur, especially the production of a specific morphogenetic effect in the developing embryo through the influence of evocators or organisers or the production of anaesthesia or unconsciousness by use of appropriate agents. Origin: L.
What is determination in developmental biology?
In classical embryology, the term ‘determination’ was used to describe the process by which a region of the embryo became committed to form a particular part of the body and it was understood that there was a particular stage of development at which determination occurred with respect to each decision1–3.
What is competency in tissue culture?
Competency: the ability to do something successfully or efficiently DEFINITION. 4. TISSUE CULTURE STEPS • In vitro culturing of plant tissue culture involves the following steps: – Collecting & sterilization of glassware tools/vessels – Preparation of explant.
What do you mean by competency?
A competency is the capability to apply or use a set of related knowledge, skills, and abilities required to successfully perform “critical work functions” or tasks in a defined work setting.
What are morphogens in biology?
The notion of “morphogens” is an important one in developmental biology. By definition, a morphogen is a molecule that emanates from a specific set of cells that is present in a concentration gradient and that specifies the fate of each cell along this gradient.