mosaic


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mosaic

 [mo-za´ik]
a pattern made of numerous small pieces fitted together; in genetics, occurrence in an individual of two or more cell populations each having a different chromosome complement.

mo·sa·ic

(mō-zā'ik),
1. Inlaid; resembling inlaid work.
2. The juxtaposition in an organism of genetically different tissues; it may occur normally (as in lyonization, q.v.), or pathologically, as an occasional phenomenon. From somatic mutation (gene mosaicism), an anomaly of chromosome division resulting in two or more types of cells containing different numbers of chromosomes (chromosome mosaicism), or chimerism (cellular mosaicism).
[Mod. L. mosaicus, musaicus, pertaining to the Muses, artistic]

mosaic

(mō-zā′ĭk)
n.
Biology An individual exhibiting mosaicism.

mo·sa′i·cist (mō-zā′ĭ-sĭst) n.
Referring to a sharply-defined tesselated patchwork of one ‘jig-saw’-shaped pattern imposed upon another of different color, tissue apearance or radiologic density
Genetics An individual with 2 or more genotypically or karyotypically distinct cell lines, arising from a single zygote by somatic mutation, crossing-over, or nondisjunction during mitotic division, an event more common in older mothers
Example Normal female mammal heterozygous for different alleles on the X chromosome; because of X chromosome inactivation, such females consist of two cell types, each with a different X chromosome inactivated, which results in a minor, epigenetic difference, in contrast to mosaic Turner syndrome in which some cells have no X chromosome at all
Gynaecology The mosaic pattern refers to vascular changes of interconnecting vessels resulting in a cobblestone or honeycomb surface appearance by colposcopy. Because the pattern is often associated with cervical intraepithelial neoplasia (CIN), a cervix with a mosaic pattern should be biopsied
Informatics A proprietary web browser (Mosaic), which was the first multiplatform browser for Macintosh, Windows, and UNIX. It was partially responsible for the Web’s explosive growth, but has long since faded into obscurity

mosaic

adjective A patchwork of one sharply-defined 'jig-saw'-shaped pattern imposed upon another of different color, tissue pattern or radiologic density noun Genetics An individual with 2 or more genotypically or karyotypically distinct cell lines, arising from a single zygote by somatic mutation, crossing-over, or nondisjunction during mitotic division. See Chimera, Freemartin Ob/Gyn A vascular change of interconnecting vessels resulting in a cobblestone or honeycomb surface appearance by colposcopy, the mosaic pattern is often associated with CIN and mandates biopsy.

mo·sa·ic

(mō-zā'ik)
1. Inlaid; resembling inlaid work.
2. The juxtaposition in an organism of genetically different tissues; it may occur normally (as in lyonization, q.v.), or pathologically, as an occasional phenomenon.
[Mod. L. mosaicus, musaicus, pertaining to the Muses, artistic]

mosaic

  1. any organism exhibiting a mixture of cells of different genetic makeup, such as a GYNANDROMORPH. See INACTIVE-X HYPOTHESIS. Plants showing this phenomenon are known as CHIMAERAS (1).
  2. a pattern of leaf-arrangement in a tree to maximize the exposure of the leaves to sunlight and thus the level of photosynthesis.

Mosaic

A term referring to a genetic situation, in which an individual's cells do not have the exact same composition of chromosomes. In Down syndrome, this may mean that some of the individual's cells have a normal 46 chromosomes, while other cells have an abnormal 47 chromosomes.
References in periodicals archive ?
There is quite a bit of work involved in the making of a mosaic breaking tiles and shaping them, placing them into a design and then cementing and binding it all together.
"This handicraft depends on different types of wood which are decorated with shells of various types, and the aesthetic value of the mosaic piece depends on the original color of the wood as the color of the lemon is yellow and the color of the poplar is white," Shaaban said.
The mosaic of Saint Mark, believed to have been made around 550 AD, was one of many that adorned the walls of the Panayia Kanakaria church, about 65 miles northeast of the capital, Nicosia.
Through this collaboration, we can jointly extend our reach across cities with The Mosaic co-working centre serving as an innovation lab to our startups."
A customer recently attested, "The FISHFUN marble mosaic installation look really fantastic on my walls.
MOSAIC's high retention rate is a result of our dedicated support and responsive feedback.
Mosaic Theater Company of DC cultivates an atmosphere of acceptance and tolerance--whether in DC or on tour--where difficult stories can be told and received with an open mind, imagination, and heart.
Byblos' new conservation center -- previously a deteriorating derelict structure that, with the support of the South Korean government, was renovated by the DGA -- is intended to be an active hub for Lebanese mosaic preservation.
"Mosaic recognized that we needed to improve our overall patient care by extending access from the surrounding communities, but do this in a way that also allowed us to save on cost," said Brenda Williams, Vice President of Technology for Mosaic.
Muscat: With Arsenal Football Club deciding not to continue with their global Soccer School Partnerships, including Oman and the MeNA Region, Mosaic Sports has decided to launch the Juventus Academy in Oman in the coming days.
Mosaic Space and Mosaic Auteurs: On the Cinema of Alejandro Gonzalez I[+ or -]arritu, Atom Egoyan, Hou Hsiao-hsien, Michael Haneke