synapsis


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

synapsis

 [sĭ-nap´sis]
the pairing off and union of homologous chromosomes from male and female pronuclei at the start of meiosis.

sy·nap·sis

(si-nap'sēz),
The point-for-point pairing of homologous chromosomes during the prophase of meiosis.
Synonym(s): synaptic phase
[G. a connection, junction]

synapsis

/syn·ap·sis/ (sĭ-nap´sis) the point-for-point pairing off of homologous chromosomes from male and female pronuclei during prophase of meiosis.

synapsis

(sĭ-năp′sĭs)
n. pl. synap·ses (-sēz)
The side-by-side association of homologous chromosomes during the first prophase of meiosis.

synapsis

[sinap′sis] pl. synapses
the pairing of homologous chromosomes during early meiotic prophase in gametogenesis to form double or bivalent chromosomes.

syn·apse

(sin'aps)
The functional membrane-to-membrane contact of the nerve cell with another nerve cell, an effector (muscle, gland) cell, or a sensory receptor cell. The synapse subserves the transmission of nerve impulses, commonly from a club-shaped axon terminal (the presynaptic element) to the circumscript patch of the plasma membrane of the receiving cell (the postsynaptic element) on which the synapse occurs. In most cases, the impulse is transmitted by means of a chemical transmitter substance (such as acetylcholine, gamma-aminobutyric acid, dopamine, norepinephrine) released into a synaptic cleft that separates the presynaptic from the postsynaptic membrane; the transmitter is stored in synaptic vesicles in the presynaptic element. In other synapses, transmission takes place by direct propagation of the bioelectrical potential from the presynaptic to the postsynaptic membrane.
Synonym(s): synapsis.
[syn- + G. hapto, to clasp]

synapsis

  1. the lying together of structures as in, for example, the junction of two nerve cells.
  2. (in genetics) the pairing of HOMOLOGOUS CHROMOSOMES in prophase 1 of MEIOSIS; the alignment of homologous regions of DNA prior to RECOMBINATION in prokaryotes.

synapsis

the pairing off and union of homologous chromosomes from male and female pronuclei at the start of meiosis.
References in periodicals archive ?
The Synapsis bridge system features scalable, multifunctional workstations that integrate the radars, electronic chart display and information system, ship control data (conning), as well as various sensors for target detection, heading, position and other navigation data, and the steering control system.
Joanna Grochowska, vice president at SYNAPSIS, said: "Autism affects people all over the world, regardless of borders and seas.
Synapsis has now been bought by the product design and lifecycle group PTC and much of its work is incorporated into the latest version of the Windchill product lifecycle management software.
Dubai-based Air Synapsis is an aviation consultancy firm for clients in the Middle East.
The murine SCP3 gene is required for synaptonemal complex assembly, chromosome synapsis, and male fertility.
As homologous chromosomes undergo synapsis during early prophase I, each chromosomes is composed of two genetically identical, or sister, chromatid arms of the bivalent condition adjacent to nonsister chromatid arms, which often cross over each other and associate with the outside nonsister chromatid arms of the bivalent for a portion of their length.
Some Synapsis clients include: Abbott, American Power Conversion (APC), Beckman Coulter, Cisco Systems, Delphi Corporation, GE Healthcare, Harley-Davidson, IBM, Intel, Mack Trucks, Motorola, Northrop Grumman, Seagate, SGI, and Sony Ericsson.
Topics include the influence of structural substrates in synaptic plasticity, artificial synapses in neuronal networks, two models of dopamine deafferentiation through synaptic alterations of the striatum, control system modeling in research on seratonin function and behavior, tetanus-derived protein in the analysis of neuronal networks, special nerve endings of the central nervous system for release of bioactive molecules, vesicle pools and their regulation by calcium-dependent regulation, properties of parallel fiber synapsis in vivo, field CA3 of the hippocampus, and the organization of the central nervous system.
Synapsis Technology offers its EMARS Environmental Compliance solution for the collection, management and reporting of industry standard IPC 1752 material declaration forms, in complying with RoHS and WEEE (Waste Electrical and Electronic Equipment) regulations.
It is also interesting that synapsis afferents reaching the solitary nucleus happens again to the PA5 connecting reciprocally ipsi- and contra-laterally with solitary, parabrachial, dorsal vagus, caudal medullar dorsal horn, C1 and C2 ventral medullar horns (the accessory's spinal nucleus portion) and SC5 nuclei (Jou et al.