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3a), Masanori Ogata (1883), Nussbaum ( 1 882; "Nebenkern"), Boveri (1888,
cited by Hirsch, 1939), Gustav Plainer ( 1 886) or shortly afterwards Fuchs (1902,
Fig. 3b). Although the authenticity as GA of the structure found by La Valette was
...
to a true 'Nebenkern' (figs. 112, 113), lying at the distal end of the nucleus. This
becomes spherical, stains more faintly than before, and differentiates into a
central denser zone and a peripheral (frequently vacuolated), more fluid layer (
figs.
the nebenkern derivatives, which form lateral elements of the sperm tail. All these
structures undergo characteristic developmental transformations during the
postmeiotic development that can be seen even on the light microscopic level (
Figs, ...
Ernst W. Caspari, John G. Scandalios,
1985
4
The Ultrastructure and Phylogeny of Insect Spermatozoa
and Locusta migratoria (Szollosi, 1975), a typical mitochondrial profile, with a
double limiting membrane and internal cristae is retained to the stage in which
the nebenkern splits into two derivatives. Transformations of the nebenkern in the
...
Barrie Gillean Molyneux Jamieson,
1987
5
Drosophila Cytogenetics Protocols
There are motile sperm in the seminal vesicle Mature sperm bundles are present,
no other defect seen Classic male sterile phenotype Unequal nuclear and
Nebenkern size at onion stage Too few cells at onion stage 16 cells, 16 large
nuclei, ...
PLATE 6 EXPLANATION OF FIGURES 79 Same stage as figure 78. Centrosome
rod shown clearly. 80 Spermatid with chromatin of nucleus more condensed.
Thread-like structure in middle of nebenkern vacuole. Mitochondria between ...
7
Problemi attuali di scienza e di cultura: quaderno
The study shows that the mitochondria fuse with each other to form a nebenkern
made of one piece. Some segments of the newly formed nebenkern are
organized into networks of rings. The networks are interlocked, but they are also
...
Accademia nazionale dei Lincei,
1970
8
Cell Reproduction: In honor of Daniel Mazia
... further RNA synthesis; it is a cell which can be precisely staged on the basis of
Nebenkern formation and differentia— tion; and it is a cell in which the specific
spatial organiza— tion of the nucleus, Nebenkern, and centriole allow the exam
— ...
9
An Introduction to the Study of Cytology
vn] NEBENKERN 101 Gatenby's later papers (1919 b, c) bring these and other
observations on the acrosome into a comprehensive scheme by indicating that
the acroblasts of Lepidoptera, and possibly the acrosome generally, belongs to
the ...
10
Physiological Systems in Insects
As mentioned earlier, fusion of the mitochondria to form the Nebenkern requires
the gene fuzzy onions (fzo). Males mutant for bag of marbles (bam) are unable to
transition from spermatogonia to spermatocytes. Mutants for no mitochondrial ...
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