15. A summary of all data now available indicate recombination percentages as follows for the group of genes near the end of the known linkage map for chromosome 1 :-

 Number of
individuals		 Per cent of
recombination
P-ts2 3296 1.3
P-zl 2567 1.6
P-ms17 2706 3.0

The order of these four genes is unknown.