C9 50.) Kimpton, enzymic systems. The broader conceptual aim was to London; Lea and Febiger, Philadelphia. 1974. provide a commentary on the relevance of such multi-This admirable textbook lies between the primers of plicity to the central themes of growth and development, human genetics and the larger textbooks. The strength evolutionary divergence, and tissue differentiation. As of the book lies firstly in the fact that the authors are the traditional divisions of biology become more and

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... ng from extensive personal practical experience and more specialized, there is an increasing need for this secondly in the excellent illustrations. One example of kind of non-specialized view of fundamental concepts, the first strength is the section on the correction of and this need has been met, by the excellent series of biased ascertainment in establishing segregation ratios. monographs, Frontiers of Biology. Here the authors go directly to the proband method of Dr Masters and Dr Holmes have succeeded in main-