一个健康的受精卵有46个染色体(23对)，但在它能分化之前，它必须先分为23个一组，形成极体。
A healthy egg carries 46 chromosomes - 23 pairs - but before it can be fertilised it needs to ditch 23 of these, which it packages into a structure called a polar body.
当这些微型染色体注入到酵母细胞中后，在细胞分裂时，这种CCCCAA的DNA序列在复制时对染色体起到了保护作用，就像鞋带末端的塑料帽对鞋带起到的防磨损作用。
When these were injected into yeast, the DNA sequence protected the chromosomes when they were copied, just as the plastic tips at the ends of shoelaces stop them from fraying.
目的探讨女性年龄对卵母细胞纺锤体和染色体构型的影响。
Objective To study the effect of maternal age on meiotic spindle and chromosome configuration of oocytes.
由此说明，基因型对秋水仙碱处理离体小孢子诱导染色体加倍的反应不同。
This indicated that different response existed in some distinct genotypes to chromosome doubling through treating in vitro microspores with colchicine.
本文对黑麦染色体的银染条件进行了探索，并对黑麦染色体上银染正反应分布区进行了研究。
The silver staining condition for plant chromosome and the positive silver staining regions of rye chromosomes were investigated.
应用小鼠骨髓微核试验及小鼠睾丸染色体畸变试验，测试蜂胶对诱变剂诱发的染色体损伤的保护作用。
Micronucleus test of bone marrow cells and chromosome aberration test were performed in mice to assess the antagonistic effect of propolis to mutation induced by mutagens.
本文对染色体图像进行预处理、特征提取和分类分析，实现对染色体的识别。
This paper mainly studies image preprocessing, feature extraction and classification analysis, accordingly realizes the chromosome recognition.
这会改变其染色体的数目，使每个细胞产生三对染色体，而通常每个细胞只有两对染色体。
This alters their plement of chromosomes, giving them three sets per cell instead of the usual two.
此时每条染色体由一对染色单体构成，这两条联合的染色体称为四分体。
At this point esch chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.
除了正常染色体对以外，还存在有第二种同源染色体的非整倍体状态，被称为三体性。
An aneuploid state in which a third homologous chromosome is present in addition to the normal autosomal pair is called trisomy.
方法采用低叶酸tc 199培养诱导法，观察了31对染色体核型无异常的习惯性流产夫妇染色体脆性位点，并观察了脆性位点的分布。
Methods: TC199 low level of folic acid cultivation method was performed to analyse both the frequency and the distribution of chromosome fragile sites in 31 habitual abortion couples.
本文用染色体图象分析系统对大麦n带染色体进行分析，同时用传统的人工方法分析，并将二者进行比较。
N-banded barley chromosomes were analyzed by both chromosome image analyzing system (CHIAS) and traditional method. CHIAS is a computer system especially for plant chromosomes.
结论染色体异常是闭经的主要原因之一，染色体核型分析对闭经患者的诊断和治疗是必要的。
Conclusion: chromosome abnormality is one of the main causes of amenorrhea. Karyotype analysis of chromosome is absolutely necessary for the diagnosis and treatment of patient with amenorrhea.
进行人类染色体组型分析就是根据上述特征对人类染色体进行分组、排列和配对。
A type of human genome analysis based on the above characteristics of the division of human chromosomes, and with matching.
目的通过对1例21号环状染色体综合征患者的细胞遗传学分析，探讨21号环状染色体的形成原因，临床表型与染色体区带的关系。
Objective to search the forming cause and the correlation between the clinical phenotype and chromosome band by the cytogenetic analysis on a case of ring chromosome 21 syndrome.
对杂交瘤细胞株的染色体计数的结果发现染色体均数为90～98条。
The number of chromosome of the hybirdoma cell line was 90 to 98.
其中有88对EST - SSR引物共扩增到101个位点并定位到20条染色体上(染色体4B上没有位点定位)。
A total of 101 EST-SSR loci amplified from 88 primer sets were distributed onto the 20 chromosomes of the reference maps (no marker on chromosome 4b).
结果表明，4.53%的细胞含有至少一对不配对的染色体，2.31%的细胞里，染色体偏离正常的数目。
The results showed that 4.53% of PMCs contained at least one unpaired of chromosomes and 2.31% of PMCs had a chromosome number deviating from their normal Numbers.
目的通过对患者外周血染色体分析，探讨染色体异常与疾病的关系。
Objective: To study the relationship between the abnormal karyotype and the disease with karyotype analysis.
对一类遗传程序设计问题，提出了简单等长的分布式染色体，取代复杂变长的树结构染色体，使演化算子操作更方便，个体复杂度得到有效控制。
One kind of simple and constant length distributed chromosome is proposed to substitute the complex and variable length tree structure chromosome for a particular kind of genetic programming problem.
采用PCR-RFLP方法，对180例无血缘关系的健康中国汉族个体的360条染色体和6个家系18位成员的36条染色体进行检测。
PCR-RFLP was used to analyze 360 chromosomes from 180 Chinese unrelated healthy Han individuals, and the analysis of the genotypes of members in six families.
为获得清晰的染色体图像，对柑橘的体细胞染色体和花粉母细胞染色体制片方法进行了研究。
The chromosome flaking methods of somatic cells and pollen mother cells of citrus plant were compared and a new method of chromosome flaking for citrus plant was developed.
对染色体分类根据染色体的排列，数目，大小，形状或其它特点划分并排列(有机体或物种的染色体配对物)。
To classify and array (the chromosome complement of an organism or a species) according to the arrangement, number, size, shape, or other characteristics of the chromosomes.
目的探讨8号染色体三体（8三体）对急性粒单、单核细胞白血病（M4、M5）细胞生物学及临床特征的影响。
Object:To evaluate the prognostic impact of trisomy 8 on cytobiological and clinical features in acute myelomonocytic and monocytic leukemia (M4, M5).
为获得清晰的染色体图像，对柑橘的体细胞染色体和花粉母细胞染色体制片方法进行了研究。
The result showed that chromosomes of most pollen mother cells behaved normaly during the meiotic divisions.
Heald长期以来对细胞内部结构的尺寸调控有着浓厚兴趣，尤其是对细胞核和在细胞分裂时牵拉染色体的纺锤体。
Heald has long been interested in what regulates the size of a cell's internal structures - in particular, the nucleus and the spindles that pull chromosomes apart during cell division.
而要利用组织培养对离体组织进行染色体加倍，首先要建立高效的组织培养再生体系。
If artificial chromosome doubling in vitro is used, a high-efficient tissue culture system must be established.
而要利用组织培养对离体组织进行染色体加倍，首先要建立高效的组织培养再生体系。
If artificial chromosome doubling in vitro is used, a high-efficient tissue culture system must be established.
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