نتایج جستجو برای: chromosome anomaly

تعداد نتایج: 157750  

ژورنال: :مجله گیاهشناسی ایران 2007
سید محمود غفاری سیده باهره جوادی

رفتار میوزی برای اولین بار در زیر گونه crocus cancellatus subsp. damascenus (سیتوتیپ 2n=8a ) گزارش می شود. نتایج نشان می دهد که این زیر گونه (سیتوتیپ 2n=8a) دارای مجموعه کروموزومی 2n=8 و عدد گامتی n=4 می باشد. دو جفت کروموزوم به هستک متصل بود که تایید کننده حضور دو جفت کروموزوم قمردار در این زیر گونه می باشد. حضور یک عدد b کروموزوم در هر دو مرحله میوز و میتوز در این سیتوتیپ برای اولین بار گزارش...

Journal: :Journal of medical genetics 1972
J R Lobitz B K McCaw F Hecht

One morphological variant of chromosome 1 in man differs from the more usual form of this chromosome in being longer and more submetacentric. This is due to increased length of the long arm and because there is apposition of chromatids in the paracentromeric region of the long arm (q). This variant, or similar appearing variants ofchromosome 1, have been found in 1 per 100 to 1 per 1000 newborn...

2006
JOHN R. LOBITZ

One morphological variant of chromosome 1 in man differs from the more usual form of this chromosome in being longer and more submetacentric. This is due to increased length of the long arm and because there is apposition of chromatids in the paracentromeric region of the long arm (q). This variant, or similar appearing variants ofchromosome 1, have been found in 1 per 100 to 1 per 1000 newborn...

2006
JOHN R. LOBITZ BARBARA K. McCAW

One morphological variant of chromosome 1 in man differs from the more usual form of this chromosome in being longer and more submetacentric. This is due to increased length of the long arm and because there is apposition of chromatids in the paracentromeric region of the long arm (q). This variant, or similar appearing variants ofchromosome 1, have been found in 1 per 100 to 1 per 1000 newborn...

2015
Feifeng Liu Huize Chen Rong Han

Being sessile, plants are continuously exposed to DNA-damaging agents presenting in the environment such as ultraviolet (UV). Sunlight acts as an energy source for photosynthetic plants; hence, avoidance of UV radiations (namely, UV-A, 315 400 nm; UV-B, 280 315 nm; and UV-C, <280 nm) is unpreventable. DNA in particular strongly absorbs UV-B; therefore, it is the most important target for UV-B i...

2012
Jun Ho Choi Youn Joo Choi So Young Kim

Trisomy 14 mosaicism is a rare chromosomal abnormality with distinct and recognizable clinical features. We report a patient with presumed retinal dystrophy having diffuse retinal pigment epithelial abnormalities, which has not been previously reported in association with trisomy 14. This case expands the clinical spectrum of this rare entity.

Journal: :Haematologica 2001
R Bigoni A Cuneo R Milani F Cavazzini A Bardi M G Roberti P Agostini M della Porta G Specchia G M Rigolin G Castoldi

BACKGROUND AND OBJECTIVES A pluripotent progenitor cell was demonstrated to be involved in myelodysplastic syndromes (MDS) with normal karyotype or with numerical chromosome aberrations, but the pattern of lineage involvement by the 5q31 deletion in the 5q- syndrome is unknown. We performed this study in order to define the distribution pattern of the 5q- anomaly better in the non-lymphoid cell...

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