Showing papers on "Ring chromosome published in 1968"
TL;DR: The clinical and cytogenetic features of two girls, aged 11 and 19, are described, which show both have a ring chromosome replacing one of the chromosomes no. 18.
Abstract: Summary
The clinical and cytogenetic features of two girls, aged 11 and 19, are described. Both have a ring chromosome replacing one of the chromosomes no. 18.
14 citations
TL;DR: In peripheral blood cultures of a phenotypically abnormal Caucasian girl, a ring-shaped chromosome was observed in place of an E group member, and it is suggested that this ring chromosome has become a permanent part of the complement of the patient.
Abstract: In peripheral blood cultures of a phenotypically abnormal Caucasian girl, a ring-shaped chromosome was observed in place of an E group member. The rest of the chromosomes of the complement did not show any obvious structural anomaly. The ring chromosome was noted in 100% of the recorded cells, and its size in individual metaphases remained fairly constant. It is suggested that this ring chromosome has become a permanent part of the complement of the patient.
10 citations
Journal Article•
10 citations
Journal Article•
6 citations
TL;DR: Ring chromosomes in man were first described in cytogenetic preparations made from malignant tissue and observed in people with leukaemia and after irradiation and in in vitro human cell line cultures subjected to cold treatment.
Abstract: RING chromosomes in man were first described in cytogenetic preparations made from malignant tissue1. Ring chromosomes have since been observed in people with leukaemia2–4 and after irradiation5–8 and in in vitro human cell line cultures subjected to cold treatment9.
5 citations
TL;DR: The chromosome irregularities and abortion of pollen grains are presumably due to gene mutation which has been enhanced in aged seeds.
Abstract: Chromosome aberrations were observed in root tip cells of Melandrium album. These aberrations were generally in the form of dicentric chromosomes involving bridge formation, ring chromosomes, fragments and elimination of acentric fragments from daughter nuclei. All the aberrations varied from 19.6 to 10.7 per cent in the first and second generation seedlings respectively. The chromosome irregularities and abortion of pollen grains (4.0 to 5.0%) are presumably due to gene mutation which has been enhanced in aged seeds.
4 citations
3 citations