NOTE ON THE DETERMINATION OF SEX IN MAN

摘要: Dr John Benjamin Nichols, in a paper recently printed this journal,1 sets forth conclusions practically identical with those to which I had come, quite independently, by the same method. He finds, effect, that three thousand New England families having six children or more, actual distribution of sons and daughters is very nearly theoretical chance distribution. There nevertheless slight tendency toward an excess are all sex, also somewhat disproportionate number boys largest families. Nichols therefore concludes sex entirely independent environment, but determined dominance one other hereditary impulses derived from two parents. The sex-making forces fight it out germ, long run about as likely be prepotent other. departures theory he would explain occasional ascendancy parent over