micronucleus

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micronucleus

 [mi″kro-noo´kle-us]
1. in ciliate protozoa, the kinetoplast, the smaller of two types of nucleus in each cell, which functions in sexual reproduction.
2. a small nucleus.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

mi·cro·nu·cle·us

(mī'krō-nū'klē-ŭs),
1. A small nucleus in a large cell, or the smaller nuclei in cells that have two or more such structures.
See also: macronucleus (2).
2. The smaller of the two nuclei in ciliates dividing mitotically and bearing specific inheritable material.
See also: macronucleus (2). Synonym(s): gametic nucleus, germ nucleus, gonad nucleus, karyogonad, reproductive nucleus
Farlex Partner Medical Dictionary © Farlex 2012

mi·cro·nu·cle·us

(mī'krō-nū'klē-ŭs)
1. A small nucleus in a large cell, or the smaller nuclei in cells that have two or more such structures.
2. The smaller of the two nuclei in ciliates dividing mitotically and bearing specific inheritable material.
See also: macronucleus (2)
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

micronucleus

the smaller of two nuclei found in some protozoans which is concerned with cell division. Compare MACRONUCLEUS.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Evolution of internal eliminated segments and scrambling in the micronuclear gene encoding DNA polymerase a in two Oxytricha species.
I think that scrambling is simply introduced by natural forces that operate on the micronuclear DNA, since the genes aren't even turned on until the pattern is entirely unscrambled.
JPL even has an "inside out" micronuclear magnetic resonance instrument, one that inserts itself in the ground and performs NMR analysis on soil samples.