scholarly journals Centromere organization and UU/V sex chromosome behavior in a liverwort

2020 ◽  
Author(s):  
Aretuza Sousa ◽  
Veit Schubert ◽  
Susanne S. Renner
Keyword(s):  
Sex Chromosome ◽  
Chromosome Behavior

Localized recombination nodules and sex chromosome behavior in the male mole cricket, Neocurtilla hexadactyla

Genome ◽  
1989 ◽  
Vol 32 (2) ◽  
pp. 275-281 ◽  
Author(s):  
B. Spyropoulos ◽  
D. Wise ◽  
P. B. Moens
Keyword(s):  
Synaptonemal Complex ◽  
Sex Chromosomes ◽  
Sex Chromosome ◽  
Chromosome X ◽  
Chromosome Behavior ◽  
Autosomal Bivalents ◽  
Electron Dense Material ◽  
Recombination Nodules ◽  
The Third ◽  
Mole Cricket

During meiotic prophase, the 10 metacentric autosomal bivalents of the mole cricket, Neocurtilla hexadactyla Perty, formed synaptonemal complexes only at their ends. These complexes were of similar morphology to those of other species. Virtually all of these distal synaptonemal complex segments contained one or more recombination nodules. There was complete correlation between the locations of the synaptonemal complex segments at pachytene and chiasmata at diplotene. The sex chromosomal bivalent X2 and Y, formed a synaptonemal complex at one end only. While no apparent physical or spatial connection was found during prophase between the X2Y bivalent and the third sex chromosome, X1, electron-dense material covered the centromeres of X1 and Y and to a lesser extent X2, thus differentiating the centromeres of the sex chromosomes from those of the autosomes.Key words: localised pairing, recombination nodules, chiasmata, sex chromosomes.

Sex chromosome behavior pattern in germ and somatic cells of Mesocricetus auratus

Chromosoma ◽  
1961 ◽  
Vol 12 (1) ◽  
pp. 362-373 ◽  
Author(s):  
Susumu Ohno ◽  
Conrad Weiler
Keyword(s):  
Sex Chromosome ◽  
Behavior Pattern ◽  
Somatic Cells ◽  
Mesocricetus Auratus ◽  
Chromosome Behavior

scholarly journals THE CONTROLLING ELEMENT IN SEX CHROMOSOME BEHAVIOR IN SCIARA

Genetics ◽  
1960 ◽  
Vol 45 (10) ◽  
pp. 1429-1443 ◽  
Author(s):  
Helen V Crouse
Keyword(s):  
Sex Chromosome ◽  
Chromosome Behavior ◽  
Controlling Element

Meiotic chromosome behavior of Haworthia limifolia

2016 ◽  
Vol 5 (03) ◽  
pp. 4902
Author(s):  
Afrin Nazli ◽  
Kamini Kumar*
Keyword(s):  
Genetic Recombination ◽  
Meiotic Chromosome ◽  
Pollen Sterility ◽  
Meiotic Abnormalities ◽  
Chromosome Behavior ◽  
The Family ◽  
Medicinal Properties ◽  
Fruit Formation ◽  
Meiosis I ◽  
Chromosomal Behaviour

Haworthia limifolia is a xerophytic plant belonging to the family Liliaceae and is indigenous to Africa. It is use extensively for its medicinal properties like antibacterial, antifungal properties and used for the treatment of sores, superficial burns, as a blood purifier and to promote pregnancy in women and cattles. In present investigation chromosomal behaviour of H. limifolia in meiosis was studied. In diplotene stage chiasmata was observed showing the possibilities of genetic recombination. Chromosome clumps were observed in diakinesis indicating sticky nature of chromosomes. Meiotic abnormalities like stickiness, precocious movement, formation of bridges and laggards were also reported in both meiosis I and II. A fairly high percentage of pollen sterility that is 73.41% was recorded resulting in failure of fruit formation. This plant could be designated as facultative apomict (Swanson, 1957) as the only means of reproduction found was asexual or vegetative.

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