IN 1941 a new gene mutation was introduced under the name of "jerker,"je, in a note by Gruneberg, Burnett and Snell. The mutant was recessive and a close mimic of the longest-known mutant of the kind, "waltzer," v. It was tested for linkage much more thoroughly than is usually possible with a new factor. The note gives prima fade evidence for inheritance independent of the following factors, to which where possible the number of the chromosome has been added:

中文翻译：

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家鼠第十二连锁群

1941 年，在 Gruneberg、Burnett 和 Snell 的一份笔记中，以“jerker”je 的名义引入了一种新的基因突变。该突变体是隐性的，与已知时间最长的突变体“waltzer” v. 非常相似。它的连锁测试比通常使用新因子可能实现的要彻底得多。该注释提供了独立于以下因素的遗传褪色的初步证据，并在可能的情况下添加了染色体的数量：