Over the years we have tested a large number of recessive mutants for location to chromosome arm using the B-A chromosome set. Initially mutants were placed after a single test but it was learned that a single positive test is not always correct; hence, a series of confirmation tests were conducted. There is now a group of 666 recessive mutants that have been located and confirmed to chromosome arm. From this group those with no counterpart on the same arm among the current gene list have now been given a name and symbol. These are listed by chromosome arm with a brief description where appropriate.
M.G. Neuffer and J.B. Beckett
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