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- Title
The dominance of exrB over exrB+ in heterodiploids of Escherichia coli.
- Authors
Greenberg, Joseph; Donch, John; Berends, Leonard
- Abstract
To test whether exrB, a mutation in Escherichia coli B making this strain sensitive to ultraviolet radiation and unable to divide normally, is dominant to exrB+, merodiploids were constructed by crossing Hfr exrB metA+his × F−malB met A thr proA recA. metA+recombinants were fertile (F′) and sensitive to UV. One of these, F′ exrB proA, was crossed with an F−metA malB thr, selecting for metA+proA+. All such progeny acquiring malB+ were UV-sensitive, fertile and segregated met mal UV-resistant progeny. They were, therefore, meriodiploids, F′ exrB/exrB+. exrB is dominant to exrB+, in which respect it resembles exrA (lex).
- Publication
Genetics Research, 1975, Vol 25, Issue 1, p39
- ISSN
0016-6723
- Publication type
Article
- DOI
10.1017/S001667230001541X