the third stage of the prophase of meiosis during which the chromosomes become shorter and thicker and divide into chromatids
Word origin
from Greek pakhus thick + tainia band
pachytene in American English
(ˈpækɪtin)
noun
Biology
the third stage of prophase in meiosis, during which each chromosome pair separates into sister chromatids with some breakage and crossing over of genes
Also: pachynema (ˌpækəˈnimə)
Word origin
[‹ F pachytène (1900), equiv. to Gk pachý(s) thick + -tène-tene]-tene is a combining form meaning “ribbon,” used in biology to form compound nouns thatrefer to the shape or number of chromosomes involved in meiosis. Other words thatuse the affix -tene include: diplotene, leptotene
Examples of 'pachytene' in a sentence
pachytene
With the above-improved steps, the high-quality well-differentiated pachytene chromosomes with clear background were obtained.
Renhai Peng, Tao Zhang, Fang Liu, Jian Ling, Chunying Wang, Shaohui Li, Xiangdi Zhang,Yuhong Wang, Kunbo Wang 2012, 'Preparations of meiotic pachytene chromosomes and extended DNA fibers from cottonsuitable for fluorescence in situ hybridization.', PLoS ONEhttp://europepmc.org/articles/PMC3307766?pdf=render. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
At pachytene the chromosomes could be counted and measured.
K. T. van Warmelo 1966, 'The Cytology of Mycosphaerella pinodes*', Bothalia: African Biodiversity & Conservationhttps://abcjournal.org/index.php/abc/article/view/1592. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Ninety-two percent of pachytene cells analyzed showed meiotic abnormalities.
A. García-Peiró, M. Oliver-Bonet, J. Navarro, C. Abad, M. Guitart, M. J. Amengual,J. Benet 2011, 'Sperm DNA Integrity and Meiotic Behavior Assessment in an Infertile Male Carrier ofa 9qh+++ Polymorphism', Journal of Biomedicine and Biotechnologyhttp://dx.doi.org/10.1155/2011/730847. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Because of poor pachytene spreading, chromosomes involved in the translocation could not be identified.
Neiva Izabel Pierozzi, Neusa Diniz da Cruz 1985, 'Um caso de translocação em um híbrido entre Zea mays L. e Z. mexicana (Schrad.) KuntzeChromosomal translocation in a hybrid between Zea mays L. and Z. mexicana (Schrad.)Kuntze', Bragantiahttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051985000200010. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
In many observations of the pachytene stage it was possible to observe and study a chromosome attached to the nucleolus.
Cândida H. T. Mendes 1950, 'Observações citológicas em Coffea: XVI - Microsporogênese em Coffea canephora Pierreex Froehner', Bragantiahttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051950000400001. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Distinct structural differences between chromosomes 3 and 4 were revealed by the high resolution pachytene chromosomes.
Qunfeng Lou, Yuhua He, Chunyan Cheng, Zhonghua Zhang, Ji Li, Sanwen Huang, JinfengChen 2013, 'Integration of High-Resolution Physical and Genetic Map Reveals Differential RecombinationFrequency between Chromosomes and the Genome Assembling Quality in Cucumber', PLoS ONE10.1371/journal.pone.0062676. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Other chromosomes in the pachytene stage were found to have a conspicuous centromere located between two highly heteropycnotic regions.
Cândida H. T. Mendes 1950, 'Observações citológicas em Coffea: XVI - Microsporogênese em Coffea canephora Pierreex Froehner', Bragantiahttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051950000400001. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)