Cytogenetics最新文献_第2页

Banding patterns in rat chromosomes (Rattus norvegicus). 褐家鼠染色体的带型。

Cytogenetics Pub Date : 1972-01-01 DOI: 10.1159/000130188

W Schnedl, M Schnedl

引用次数: 22

Inherited pericentric inversion of chromosome 5: a family with history of neonatal death and a case of the "cri du chat" syndrome. 遗传性5号染色体周中心倒位:有新生儿死亡史的家族和“cri du chat”综合征1例。

Cytogenetics Pub Date : 1972-01-01 DOI: 10.1159/000130206

M J Faed, V J Marrian, J Robertson, E B Robson, P J Cook

引用次数: 0

Chromosome polymorphism and its possible implications in the select Drysdale breed of sheep. 染色体多态性及其在绵羊品种选择中的可能意义。

Cytogenetics Pub Date : 1972-01-01 DOI: 10.1159/000130194

A N Bruère, H M Chapman, D R Wyllie

引用次数: 15

Nonrandom arrangement of metaphase chromosomes in cultured cells of the Indian deer, Muntiacus muntjak. 印度鹿培养细胞中期染色体的非随机排列。

Cytogenetics Pub Date : 1972-01-01 DOI: 10.1159/000130185

W K Heneen, W W Nichols

{"title":"Nonrandom arrangement of metaphase chromosomes in cultured cells of the Indian deer, Muntiacus muntjak.","authors":"W K Heneen, W W Nichols","doi":"10.1159/000130185","DOIUrl":"https://doi.org/10.1159/000130185","url":null,"abstract":"The Indian deer, Muntiacus muntjak, with its low number of individually identifiable chromosomes (♂, 2n = 7), is a suitable material for studies on the spatial interrelationships among metaphase chromosomes on the equatorial plate. Cultured monolayers not subjected to colchicine or hypotonic treatments were analyzed in situ. The emphasis mainly was placed on determining the locations of the centromeres of the six large chromosomes, which usually occupied peripheral positions at the equator. The frequencies found of certain patterns of chromosome arrangement deviated significantly from what would be expected if these patterns were random. Cells in which homologs were next to each other were more frequent than expected. In configurations in which no homologous chromosomes occupied adjacent positions, symmetrical radial arrangements, based on homology or proximity in size, were favored. The position of the Y chromosome usually was close to the centromeric region of the X-autosome, which might be a consequence of a heterochromatic association or partial homology between the X and Y. Factors relevant to the chromosome arrangement on the equatorial plate may be somatic pairing, symmetrical spatial interrelationships between chromosomes based on homology or size, and heterochromatic association.","PeriodicalId":78202,"journal":{"name":"Cytogenetics","volume":"11 3","pages":"153-64"},"PeriodicalIF":0.0,"publicationDate":"1972-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1159/000130185","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"16127598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 45

Triploidy in rainbow trout. 虹鳟鱼的三倍体。

Cytogenetics Pub Date : 1972-01-01 DOI: 10.1159/000130217

O Cuellar, T Uyeno

引用次数: 81

Late labelling as an aid to chromosomal sexing of cultured mouse blood cells. 晚期标记对培养小鼠血细胞染色体性别鉴定的辅助作用。

Cytogenetics Pub Date : 1972-01-01 DOI: 10.1159/000130174

A McLaren

引用次数: 6

Asynchronous centromere division in the Chinese hamster. 中国仓鼠的非同步着丝粒分裂。

Cytogenetics Pub Date : 1972-01-01 DOI: 10.1159/000130180

A A Bregman

引用次数: 11

[Absence of correlation between XX-XY chimerism in the liver and the first signs of freemartinism in the calf fetus]. [肝脏中XX-XY嵌合与小牛胎儿自由艺术症的最初迹象之间缺乏相关性]。

Cytogenetics Pub Date : 1972-01-01 DOI: 10.1159/000130179

B Vigier, J Prepin, A Jost

{"title":"[Absence of correlation between XX-XY chimerism in the liver and the first signs of freemartinism in the calf fetus].","authors":"B Vigier, J Prepin, A Jost","doi":"10.1159/000130179","DOIUrl":"https://doi.org/10.1159/000130179","url":null,"abstract":"XX/XY chimerism has been studied in the liver of 22 presumptive freemartin fetuses and in 12 male cotwins of multiple pregnancies, at an age of 39 to 62 days post-insemination. At these stages, the majority of the liver cells are hematopoietic cells. In these fetuses, the degree of chimerism varies from 0% to 55 %. Except for one case, the cells of the host predominate, i.e., the percentage of XY cells in freemartins is less than 50 % and is of the same order of magnitude as the number of XX cells in the male twin. According to several authors, freemartins and their male twins, when studied postnatally, possess the same percentage of XY (or XX) blood cells (variations from 1 % to almost 100%). These data suggest that the degree of chimerism of blood cells might change during development. If this is so, it seems unwarranted to compare chimerism in postnatal freemartins with the sex anomalies which appeared at an early fetal stage. The first signs of freemartinism (inhibition of gonadal growth and regression of the upper part of the Mullerian ducts) appear after day 48. In 15 freemartin fetuses of 49 to 62 days of age, the degree of inhibition of the left ovary and of the upper Mullerian ducts was compared with the percentage of XY cells present in the liver. The degree of inhibition of the ovarian volume and of the diameter of the upper Mullerian ducts was evaluated by reference to regression lines which had been previously calculated for a larger number of freemartins of the same age. There is no correlation between the percentage of XY cells and the degree of inhibition of the ovaries or of the Mullerian ducts.","PeriodicalId":78202,"journal":{"name":"Cytogenetics","volume":"11 2","pages":"81-101"},"PeriodicalIF":0.0,"publicationDate":"1972-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1159/000130179","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"16113828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Odd diploid number in both sexes and a unique multiple sex-chromosome system of a rodent, Vandeleuria o. oleracea (Bennett). 一种啮齿类动物雌雄双倍体奇数和独特的多重性染色体系统。

Cytogenetics Pub Date : 1972-01-01 DOI: 10.1159/000130195

T. Sharma, R. Raman

引用次数: 8

Karyotype analysis of Xenopus muelleri (Peters) and Xenopus laevis (Daudin), Pipidae. 毛爪蟾和爪蟾核型分析。

Cytogenetics Pub Date : 1972-01-01 DOI: 10.1159/000130197

J. Tymowska, H. Kobel

引用次数: 59