Chromosome mutations can occur naturally but their frequency is increased by the effect of x-rays and chemical mutagens.
染色体的突变是自然发生的，但通过 X 射线或化学诱变剂可以增加突变的频率。
One of the genes controlling sweat gland in human is located on X chromosome.
控制人类汗腺的一个基因位於X染色体上。
Here we show that a newly evolved sex chromosome contains genes that contribute to speciation in threespine stickleback fish.
基因定位研究显示，新形成的X染色体包含雄性求偶行为基因，而先祖X染色体既包含行为隔离基因，又包含杂交种雄性不育基因。
The power of the X chromosome doesn't extend to other parts of Chinese society.
X染色体上的影响力并不延伸到中国社会的其他部分。
If one chromosome is an X and the other a Y, it`s a boy.
如果一个染色体是X，另一个是Y，就是男孩。
Sometimes there may be abnormalities in the X chromosome in only some cells in the body.
有时可能会有异常的X染色体中，只有一些细胞在人体内。
The genes for two of the factors, VIII and IX, are on the X chromosome.
该基因的两个因素，第八和第九，是对X的染色体。
This means that the abnormal gene is carried on the x chromosome and is passed from mother to son only.
这意味着该基因异常是进行了X染色体上，并通过由母亲传染给儿子只。
The disease is passed from mother to son on the X chromosome.
这种疾病是通过由母亲传染给儿子，对X染色体上。
However, it is located on the X chromosome and a single mutation can effectively stop it from working.
而且，这段基因位于X染色体一个突变就会让这个基因失效。
Hemophilia B is an X-linked bleeding disease, caused by the mutations of human coagulation factor IX gene located in chromosome X. It results in a dramatic decline of hFIX quantity or clotting activity in plasma, and the intrinsic clotting pathway is affected seriously.
血友病B是一种性连锁隐性遗传病，其发病机制是位于X染色体上的人凝血因子IX基因发生了突变，导致血浆中hFIX含量或活性大幅下降，从而使得内源性凝血途径受到阻碍，无法进行正常的凝血。
Chromosome evolution: x= 11 occurred in most genera of Komarovieae through Selineae; other basic chromosome number originated multiple times independently in the subfamily Apioideae; For Pleurospermum and Pimpinella, the basic chromosome number of each coincide with their phylogenetic placement.
从性状演化图上看，整个芹亚科的染色体祖先状态可能为 x= 11或者 x= 6，而且亚科内的大多数类群均保持了 x= 11这一祖征；对于其它基数，一般在芹亚科内多次独立起源，构成各自的自征或者共有衍征；对于多系类群，如棱子芹属和茴芹属，染色体分析的结果很好的支持了他们各自的系统位置。
It yields an accuracy rate of over 90% for X chromosomes, and over 80% for Y chromosome.
它会产生一个以上的X染色体，90％的准确率，超过80％的Y染色体。
This study investigated endothelial chimerism and its influential factors with X and Y chromosome probes by fluorescence in situ hybridization.
使用X，Y染色体探针通过荧光原位杂交法观察移植肾中血管内皮细胞被受体内皮细胞替代的情况，并分析内皮细胞替代的影响因素。
Results: Of the 100 spermatozoa analysed, 97 showed either one X chromosome-specific green signal or one Y-chromosome-specific red Y signal in each spermatozoon and only 3 showed no signal.
结果 ：受检的 10 0个精子中，X精子占 4 9%，Y精子占 4 8%，无杂交信号的精子占 3%。X精子与Y精子比例与预期值相同约为 1∶1.4 6 ，XY/ 4 7，XXY少精子症患者与正常对照男性所携带XX精子和XY精子频率比较无统计学差异。
The phenotype of partial monosomy X, such as POF, would present in case of unbalanced translocation(X; 1) since puberty besides that of partial trisomy 1.The attenuated phenotype should be owing to skewed X inactivation in derivative X chromosome.
研究表明，在(X；1)不平衡易位的患者中，部分X单体的表型如卵巢早衰等可在青春期后表现出来；部分1－三体的表型弱化可能与X染色体偏颇失活有关。
Previous studies have found several chromosome areas that influence dyslexia. These chromosome areas are located on chromosome 1, 2, 3, 6, 15, 18 and chromosome X. A recent study reported a gene located in l5q21 and this is the first candidate gene for dyslexia.
目前，有关阅读障碍的分子遗传学研究表明1、2、3、6、15、18号染色体和X染色体与阅读障碍有关，而且研究者已在15号染色体的15q21区域发现了第一个阅读障碍的候选基因。
Objective To explore the application value of STRs of X-chromosome and autosome in Duo-cases.
目的 探讨X-STR和常染色体STR在二联体亲权鉴定中的应用价值。
Methods: The inhibitory effect of mevastatin on proliferation of A549 and NCI-G520 cell lines in vitro was detected by MTT assay. The cell cycle arrest and apoptosis were observed by flow cytometry analysis and transmission electron microscopy. The expression of p21 protein was determined by flow cytometry. The mRNA expression of P21 and X-chromosome-linked inhibitor of apoptosis protein was measured with reverse transcription-polymerase chain reaction.
应用MTT法检测美伐他汀对A549、NCI-H520细胞株的体外增殖作用，应用流式细胞仪，透射电镜，研究美伐他汀对A549、NCI-H520细胞株的细胞周期阻滞和诱导调亡的作用，应用流式细胞术和RT-PCR检测P21蛋白、P21 mRNA、XIAP mRNA的表达，以研究细胞周期阻滞和诱导调亡的机制。
To study the effect of X-ray on chromosome aberration of interventional employees with radiation exposure.
目的 研究X射线对介入放射工作人员染色体畸变的影响。