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。

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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。

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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。

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That focused the search still further and the team was then able to employ more modern methods using genetic markers to show which small fraction of chromosome 16 the apomixis genes inhabit.

ECONOMIST: Genetic engineering

The researchers, led by Dr George Zubenko, found that a small area of Chromosome 10 of human DNA called D10S1423, when combined with a previously identified gene APOE E4, produced the increased risk of developing the disease.

BBC: Genetic clue to Alzheimer's risk