The genetics of recombination / D.G. Catcheside.
- David Guthrie Catcheside
- Date:
- [1977]
Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
Credit: The genetics of recombination / D.G. Catcheside. Source: Wellcome Collection.
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![121 í-YS02y;\4£ I—I Fig. 7.1 Bacteriophage Т4 genetic map, based on Wood (1974) and other data. The numbered genes on the outside of the circle are defined by conditional lethal (temperature sensitive or amber) mutants. Numbers 1 to 49 were originally defined and placed in numerical order, clockwise fi^om a point near locus e (lysozyme) ; numbers 50 to 62, discovered later, are interpolated. Some other genes are marked on the inside of the circle; these include host range {h and r), minute plaque [m], turbid plaque {tu) and clear plaque (c) loci used in classical experiments on T4. Loci concerned with particular functions are grouped in special parts of the chromo¬ some, thus : loci 3 to 18 for the tail, loci 19 to 24 for the head, loci 34 to 37 for the tail fibres and loci 41 to 47 for early events in the growth of the phage. (Stahl, Edgar and Steinberg, 1964; Mosig, 1968; Wood et al., 1968; Wood, 1974; Russell, 1974). Recombination analysis (Mosig, 1970a) involves the infection of bacteria simultaneously with two, or more, different phages, differing in mutant characters. Hershey and Rotman (1949) found no correlation](https://iiif.wellcomecollection.org/image/b18025560_0136.JP2/full/800%2C/0/default.jpg)
