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.

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

micronucleus

/mi·cro·nu·cle·us/ (-noo´kle-us)
1. in ciliate protozoa, the smaller of two types of nucleus in each cell, which functions in sexual reproduction; cf. macronucleus.
2. a small nucleus.

micronucleus

[-no̅o̅′klē·əs]
1 a small nucleus.
2 the smaller of two nuclei in some protozoa. It functions in sexual reproduction. Compare macronucleus.

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)

micronucleus

the smaller of two nuclei found in some protozoans which is concerned with cell division. Compare MACRONUCLEUS.

micronucleus

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.
3. nucleolus.
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.