Neotoma micropus from Jack County, Texas, were studied over a 9-month period. Loci from blood and saliva were used to determine genetic variation within the population. Deviations from Hardy-Weinberg equilibrium were found at one locus. The average temporal F over all seven loci was 0.040. Genetic structuring was subtle, fluctuated on a seasonal basis, and was due to differential migration or predation on genotypes. Heterozygotes tended to move more than homozygotes, and a greater proportion of heterozygotes were lost from the population during each season. Genetic variation was maintained in the population by immigrant individuals. This differential in dispersal of genotypes fits current models of reorganization within the genome of populations.

The problem is to prepare and administer a physical education program for the fifth, sixth, seventh, and eighth grade boys in the elementary school of Jacksboro, Texas. The need for this study developed after the investigator had studied the few activities in which the fifth, sixth, seventh, and eighth grade boys in the elementary school of Jacksboro, Texas, were participating. It is the aim of the investigator to construct a physical education program that will give more boys an opportunity to participate in desirable activities.