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morphogen

morphogen A substance that determines the developmental fate of part of an embryo. During development, different morphogens are produced within the embryo or by cells of the surrounding maternal tissue. They diffuse through the embryonic tissue, each one establishing its own concentration gradient, and together they form a chemical pattern on which embryonic development is based (see pattern formation). The complex interplay of these morphogen gradients regulates the activity of genes in different regions of the embryo and ultimately brings about the differentiation of the tissues and organs appropriate to the different regions of the embryo, i.e. morphogenesis. In the development of the fruit fly Drosophila, for example, the anterior and posterior ends of the egg are ‘signposted’ by proteins encoded respectively by bicoid and nanos genes in maternal follicle cells. The messenger RNAs from these genes accumulate at opposite ends of the egg cell (oocyte), and their products subsequently diffuse into the fertilized egg, thereby establishing its polarity at the outset of development. These represent the beginning of a cascade of morphogens that influence gene activity in an increasingly precise manner.

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"morphogen." A Dictionary of Biology. . Encyclopedia.com. 28 Jun. 2017 <http://www.encyclopedia.com>.

"morphogen." A Dictionary of Biology. . Encyclopedia.com. (June 28, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/morphogen-0

"morphogen." A Dictionary of Biology. . Retrieved June 28, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/morphogen-0

morphogen

morphogen An environmental factor, such as a chemical substance, that establishes a concentration gradient affecting morphogenesis in organisms exposed to it.

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"morphogen." A Dictionary of Earth Sciences. . Encyclopedia.com. 28 Jun. 2017 <http://www.encyclopedia.com>.

"morphogen." A Dictionary of Earth Sciences. . Encyclopedia.com. (June 28, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/morphogen

"morphogen." A Dictionary of Earth Sciences. . Retrieved June 28, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/morphogen

morphogenesis

morphogenesis The development, through growth and differentiation, of form and structure in an organism.

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"morphogenesis." A Dictionary of Biology. . Encyclopedia.com. 28 Jun. 2017 <http://www.encyclopedia.com>.

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"morphogenesis." A Dictionary of Biology. . Retrieved June 28, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/morphogenesis-0

morphogenesis

morphogenesis (mor-foh-jen-i-sis) n. the development of form and structure of the body and its parts.

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"morphogenesis." A Dictionary of Nursing. . Encyclopedia.com. 28 Jun. 2017 <http://www.encyclopedia.com>.

"morphogenesis." A Dictionary of Nursing. . Encyclopedia.com. (June 28, 2017). http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/morphogenesis

"morphogenesis." A Dictionary of Nursing. . Retrieved June 28, 2017 from Encyclopedia.com: http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/morphogenesis

morphogenesis

morphogenesis The development of the form and structure of an organism by growth and differentiation.

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"morphogenesis." A Dictionary of Earth Sciences. . Retrieved June 28, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/morphogenesis

Morphogenesis

Morphogenesis

See Evolution

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"Morphogenesis." Encyclopedia of Science and Religion. . Encyclopedia.com. 28 Jun. 2017 <http://www.encyclopedia.com>.

"Morphogenesis." Encyclopedia of Science and Religion. . Encyclopedia.com. (June 28, 2017). http://www.encyclopedia.com/education/encyclopedias-almanacs-transcripts-and-maps/morphogenesis

"Morphogenesis." Encyclopedia of Science and Religion. . Retrieved June 28, 2017 from Encyclopedia.com: http://www.encyclopedia.com/education/encyclopedias-almanacs-transcripts-and-maps/morphogenesis