There have been few serious investigations of multi-point crosses among mammals, There are probably two reasons for this. In the first place, investigation of multi-point crosses requires an intensive level of analysis which has had few aspirants. In the second place, only fairly recently have extensive linked groups of genes become available which would make such analyses profitable. The way is now open for a more systematic study of multiple linkage, as opposed to opportunist use of such linked genes as are readily available. The analytical and statistical procedures have been thoroughly outlined in a number of publications (Owen, 1950, 1953b; Parsons, 1958; Bailey, 1961). A full and interesting discussion of many of the basic principles which should be followed has been provided by Wallace (1957a).
KeywordsMating Type Double Crossover Linkage Phase Intensive Level Crossover Function
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