- A
macronucleus (formerly also meganucleus) is the
larger type of
nucleus in ciliates.
Macronuclei are
polyploid and
undergo direct division without mitosis...
- not
express its genes. The
macronucleus provides the
small nuclear RNA for
vegetative growth.
Division of the
macronucleus occurs in most
ciliate species...
-
nuclear apparatus,
consisting of a
polyploid macronucleus, and one or more
diploid micronuclei. The
macronucleus controls non-reproductive cell functions...
- a
macronucleus that is
primarily used to
control metabolism, and a
micronucleus which performs reproductive functions and
generates the
macronucleus. The...
-
nuclei (a
large macronucleus and a
single compact micronucleus). As in
other ciliates,
individuals cannot survive without the
macronucleus and
cannot reproduce...
-
existing at a copy
number of
approximately 10,000
within the
macronucleus.
Because the
macronucleus divides amitotically during binary fission,
these minichromosomes...
-
experiments of
Aufderheide in 1986.
These experiments demonstrated that the
macronucleus, and not the cytoplasm, is
responsible for
clonal aging.
Additional experiments...
-
division of the
macronucleus is
accomplished during binary fission of the cell. In
ciliates of this subphylum,
division of the
macronucleus is
achieved by...
- visible. The
macronucleus is long and sausage-shaped, and the
spherical micronucleus is
nested next to it,
often hidden by the
macronucleus. The opening...
- Spirostomum’s
macronucleus,
possessing a
double membrane with perforations, is the
first record of a
nucleus being highly extensile. The
macronucleus can initially...
