The Blood Groups of a Further Family with Nail-Patella Syndrome.

IN 1955 Renwick and Lawler recognized linkage between the ABO and nailpatella loci. In their most recent paper on the subject (Lawler, Renwick, Hauge, Mosbech and Wildervanck, 1 9 5 8 ) they estimated the recombination value to be 9.6 + 2.4 per cent with no detectable heterogeneity between families with respect to this value. In the family set out in Fig. I the blood group data are compatible with linkage between the two loci and with the recombination value of Lawler et al., the crude linkage-recombination ratio for the two loci being 5: 1.