centromeric
2.Relation between Variation of Centromeric Alpha Satellite DNA on Human X Chromosome and Aneuploidy
3.Objective To find an effective method which can be used for studying variation of X chromosome centromeric alpha satellite DNA.
4.(2)All the centromeres of chromosomes were C-bands positive and so was the short arm of the 1st chromosome with tinctorial strength same as its centromeric C-bands;
5.Six cases for trisomy 12 were detected by one centromeric probe for 12.And del(13q14.3),del(11q23) were usually detected in normal karyotype.
6.Giemsa C-banding patterns of 16 taxa of the genera Poncirus,Fortunclla and Citrus were examined. Prominant telomeric and centromeric bands were observed in Poncirus,while For-tanella species and most taxa of Citrus possessed predominant telomeric bands besides some non-bands.
7.Complete sequencing of the 124-kb rice chromosome 4 centromere revealed that it consisted of eighteen tracts of 379 tandemly arrayed repeats known as CentO and a total of nineteen centromeric retroelements (CRs) but no unique sequences were detected.
8.The numbers of chromosome of the grasshoppers of 3 species are all 2n(♂)=17=16+XO,16 autosomes are composed of 6 nearly median centromeric chromosomes and 10 acrocentric chromosomes,The X sexchromosome is acrocentric one too.
