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The condition in which one chromosome of a pair is missing a diploid organism.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the absence of one chromosome from the complement of a diploid organism. A monosomic is a cell or organism which has a single chromosome of a homologous pair. Monosomy is the result of disruption during the separation of homologous chromosomes. It occurs most often in the sex cells during meiosis but is also possible in the somatic cells during mitosis. For example, individuals suffering from Turner’s syndrome (Shereshevskii-Turner syndrome) are monosomics for the X chromosome.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The sexual chromosomes X1 and X2, disomic in females and monosomic in males, were also metacentric.
In order to clearly identify Early Premium gene(s) composition, Classic genetics, allelic analysis and monosomic analysis are used in this study.
Seven monosomic lines of the D genome of wheat cultivar Chinese Spring (CS), which is susceptible to tan spot, were crossed with three synthetic lines XX41, XX45, and XX110.
In group 1, 13 cases were identified as monosomic for chromosome 3 and 11 were identified as disomic for chromosome 3 by SNP array analysis.
Monosomic analysis of Russian wheat aphid (Diuraphis noxia) resistance in Triticum aestivum line PI 137739.
Assignment of a subset of these markers to this chromosome was confirmed by means of progeny derived by pollinating a plant monosomic for the N-carrying chromosome of Holmes Samsoun (derived by crossing Red Russian Haplo H with Holmes Samsoun) with pollen from TM[V.sup.S] cultivar K326.
Recurrent parent hypoaneuploid: monosomic (H) or monotelodisomic (Te) Designation of released line Designation Chromosome Short arm CS-1101 H01 1 hemizygous CS-1302 H02 2 hemizygous CS-1304 H04 4 hemizygous CS-1105sh Te05Lo 5 hemizygous CS-1106 H06 6 hemizygous CS-1307 H07 7 hemizygous CS-B11sh Te11Lo 11 hemizygous CS-B12sh Te12Lo 12 hemizygous CS-B14sh Te14Lo 14 hemizygous CS-B15sh Te15Lo 15 hemizygous CS-1116 H16 16 hemizygous CS-1317 H17 17 hemizygous CS-1418 ([double dagger]) H18 18 hemizygous CS-B22Lo Te22sh 22 disomic CS-B22sh Te22Lo 22 hemizygous CS-1325 H25 25 hemizygous CS-B26Lo Te26sh 26 disomic Recurrent parent hypoaneuploid: monosomic (H) or monotelodisomic Chromosome or segment (Te) substituted from Designation of G.
In the cytogenetic study, Chinese Spring, monosomic plants of each of the 21 monosomic lines and the monotelosomic 3A line were tested for seedling reaction to SNB.
(2003) reported that [Rf.sub.1] is located on Chromosome 4 based on monosomic analyses of [Rf.sub.1]-linked markers.
It was transferred to Pavon 76 via backcrossing and moved via monosomic shift from its original substitution for 1D to substitutions for 1A and 1B.
Larson and MacDonald (1959) used monosomic lines of 'S-615', a solid stem wheat, and identified potential genes for stem solidness on chromosomes 3B, 3D, 5A, 5B, and 5D.
australe hexaploid, 13 monosomic addition B[C.sub.2] lines of G.