期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1973
卷号：70
期号：7
页码：2046-2050
DOI：10.1073/pnas.70.7.2046
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：We describe the application of a simple genetic test that indicates the order of events in a morphogenic or biochemical pathway. The test uses temperature-sensitive (ts) and cold-sensitive (cs) mutants, and it orders the times at which the ts and cs defects are expressed.
