the number of chromosomes present in each somatic cell, which is constant for any one species of plant or animal. In the reproductive cells this number is halved
See also diploid (sense 1), haploid
chromosome number in American English
noun
Genetics
the characteristic number of chromosomes contained in the cell nucleus of a given species
Word origin
[1905–10]This word is first recorded in the period 1905–10. Other words that entered Englishat around the same time include: cadre, persona, scrounge, stabilizer, thiamine
Examples of 'chromosome number' in a sentence
chromosome number
Chamaesyce, with which shared the same chromosome number 2n = 28 and basic chromosome number x = 7.
Xinmin Tian, Qiuyan Wang, Yongfeng Zhou, Yongfeng Zhou 2018, 'Euphorbia Section Hainanensis (Euphorbiaceae), a New Section Endemic to the HainanIsland of China From Biogeographical, Karyological, and Phenotypical Evidence', Frontiers in Plant Sciencehttps://www.frontiersin.org/article/10.3389/fpls.2018.00660/full. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The regenerated plantlets had diploid chromosome number.
Jevremović Slađana, Subotić Angelina, Trifunović Milana, Nikolić Marija 2009, 'Plant regeneration of southern Adriatic iris by somatic embryogenesis', Archives of Biological Scienceshttp://www.doiserbia.nb.rs/img/doi/0354-4664/2009/0354-46640903413J.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The pentaploid chromosome number ranged from 20 to 34, and the tetraploid chromosome number from 16 to 28.
Fernando Ferreira Leão, Lisete Chamma Davide, José Marcello Salabert de Campos, AntonioVander Pereira, Fernanda de Oliveira Bustamante 2011, 'Genomic behavior of hybrid combinations between elephant grass and pearl millet',Pesquisa Agropecuária Brasileirahttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000700006&lng=en&tlng=en. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
These species varied greatly in their chromosome number and morphology.
Ashutosh Mukherjee, Satyesh Chandra Roy 2013, 'Karyotype analysis of some species of Asparagales', Current Botanyhttps://updatepublishing.com/journal/index.php/cb/article/view/1441. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The diploid chromosome number (2n) in this species was 100.
Martin Knytl, Lukáš Kalous, Petr Rab 2013, 'Karyotype and chromosome banding of endangered crucian carp, Carassius carassius (Linnaeus,1758) (Teleostei, Cyprinidae)', Comparative Cytogeneticshttp://compcytogen.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_pdf&item_id=1797. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The results showed a diploid chromosome number of 50 chromosomes.
Diogo Hashimoto, Tatiana Voltolin, Ana Paes, Fausto Foresti, Jehud Bortolozzi, FabioPorto-Foresti 2012, 'Cytogenetic analysis of B chromosomes in one population of the fish Moenkhausia sanctaefilomenae(Steindachner, 1907) (Teleostei, Characiformes)', Comparative Cytogeneticshttp://compcytogen.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_pdf&item_id=1754. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
All specimens had a secondary basic chromosome number of ten.
J. J. Spies, T. H. Troskie, E. van der Vyver, S. M. C van Wyk 1994, 'Chromosome studies on African plants. 11. The tribe Andropogoneae (Poaceae: Panicoideae)',Bothalia: African Biodiversity & Conservationhttps://abcjournal.org/index.php/abc/article/view/778. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The haploid chromosome number was found to be 15.
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)
Most errors in chromosome number originate from oocytes.
Jin-Mei Cheng, Yi-Xun Liu 2017, 'Age-Related Loss of Cohesion: Causes and Effects', International Journal of Molecular Scienceshttps://www.mdpi.com/1422-0067/18/7/1578. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)