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pachytene

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pachytene
pachytene Cytology. (ˈpækɪtiːn) [ad. F. pachytène (H. von Winiwarter 1900, in Arch. de Biol. XVII. i. 63): see pachy- and -tene.] The third stage of the first meiotic prophase, following zygotene, during which the paired chromosomes shorten and thicken, the two chromatids of each separate, and excha... Oxford English Dictionary
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Rachis
elegans, a rachis is the central cell-free core or axis of the gonadal arm of both adult males and hermaphrodites where the germ cells have achieved pachytene wikipedia.org
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diplotene
diplotene Biol. (ˈdɪpləʊtiːn) [ad. Fr. diplotène (H. von Winiwarter 1900, in Archives de Biol. XVII. i. 70), f. diplo- + -tene.] The fourth stage of the prophase of meiosis (following pachytene), in which the four chromatids of each tetrad begin to separate into two pairs, each pair containing one c... Oxford English Dictionary
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Chiasma (genetics)
Irradiation during the leptotene-zygotene stages of meiosis, that is, prior to the pachytene period in which crossover recombination occurs, was found Similarly, in the grasshopper Chorthippus brunneus, exposure to X-irradiation during the zygotene-early pachytene stages caused a significant increase wikipedia.org
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pachynema
pachynema, n. Cytol. (pækɪˈniːmə) [a. F. pachynema (V. Grégoire 1907, in La Cellule XXIV. 3707: see pachy-, *-nema.] = pachytene n.1909 Archiv für Zellforschung III. 437 The longitudinal pairing of the univalent spireme segments is completed..at about the middle of the synapsis, giving rise to the t... Oxford English Dictionary
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ZFY
During spermatogenesis, wrongful expression of either Zfy1 or Zfy2 results in programmed cell death, apoptosis, at the mid-pachytene checkpoint. Thus, Zfy performs three functions at the mid-pachytene checkpoint: (1) promote MSCI, (2) monitor MSCI progress, and (3) execute cells, via apoptosis, wikipedia.org
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Chromomere
Physical properties Chromomeres are organized in a discontinuous linear pattern along the condensed chromosomes (pachytene chromosomes) during the prophase References External links "Preparation and analysis of spermatocyte meiotic pachytene bivalents of pigs for gene mapping" - Nature "Physical mapping wikipedia.org
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HORMAD1
Plays a key role in the male mid-pachytene checkpoint and the female meiotic prophase checkpoint: required for efficient build-up of ATR activity on unsynapsed wikipedia.org
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David Hungerford
scientific contributions Prior to the introduction of banding techniques on somatic metaphase chromosomes, David began investigating chromosomes at the pachytene At the time of his retirement due to illness in 1982, David had mapped almost half of the normal human complement of chromosomes at pachytene. wikipedia.org
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BRD7
Azoospermia BRD7 protein is a transcription regulator that is normally highly expressed in the testis, particularly in meiotic pachytene and diplotene wikipedia.org
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Goniaea australasiae
The meiotic stage at which this form of recombination takes place has been identified as "early pachytene," and it is well removed from premeiotic chromosome wikipedia.org
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Synaptonemal complex
This "tripartite structure" is seen during the pachytene stage of the first meiotic prophase, both in males and in females during gametogenesis. Previous to the pachytene stage, during leptonema, the lateral elements begin to form and they initiate and complete their pairing during the zygotene wikipedia.org
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Leptotene stage
From the leptotene stage to early pachytene, exogenous DNA damage triggers the massive presence of gammaH2AX throughout the cell nucleus, which is associated From mid-pachytene to diplotene the predominant DNA repair pathway is non-homologous end joining. wikipedia.org
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KLHDC3
Its expression in pachytene spermatocytes is localized to cytoplasm and meiotic chromatin, which suggests that this gene may be involved in meiotic recombination wikipedia.org
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FANCD2
In the non-mutant mouse, FANCD2 is expressed in spermatogonia, pre-leptotene spermatocytes, and in spermatocytes in the leptotene, zygotene and early pachytene FANCD2 mutant mice exhibit chromosome mis-pairing during the pachytene stage of meiosis and germ cell loss. wikipedia.org
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