Conclusion the extra small chromosome is part of the chromosome Y.
结论：额外小染色体来源于Y染色体。
Scientists identified small chromosome variations that arose spontaneously in patients.
科学家证实了细微的染色体变异同时出现在父母身上。
The DNA analyses also show that only a small part of a chromosome was transferred.
DNA分析也显示仅仅一个染色体的一小部分被转移。
People with diverse symptoms including mental retardation, small head size, heart problems and cataracts have genomic rearrangements on the same region of chromosome 1, researchers reported last week.
患有诸如精神发育迟滞，小头症，心脏病和白内障等众多不同疾病的人们在第一号染色体上的某相同区域内发生了基因组的重排，研究者们上周报道。
Using gene-mapping techniques, the researchers identified a small stretch of DNA on chromosome 2, where the disease-causing gene was thought to reside.
研究人员运用基因制图技术鉴定了2号染色体上的一小段DNA，而通常认为致病基因就存在于该染色体。
Using gene-mapping techniques, the researchers identified a small stretch of DNA on chromosome 2, where the disease-causing gene was thought to reside.
研究人员运用基因制图技术鉴定了2号染色体上的一小段DNA，而通常认为致病基因就存在于该染色体。
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