Considerable ffort has been spent documenting correlations between dioecy and various ecological and morphological traits for the purpose of testing hypotheses about conditions that favor dioecy. The data analyzed in these studies, with few exceptions, come from local floras, within which it was possible to contrast he subsets of dioecious and nondioecious taxa with regard to the traits in ques...

CONSIDERABLE work has been done during the last few years on the genetics and cytogenetics of the yellow-fever mosquito, Aedes aegypti. However, the emphasis of this work has been in the areas of genetics of insecticide resistance (BROWN and ABEDI 1962), formal genetics (CRAIG and HICKEY 1967), cytology (AKSTEIN 1962; RAI 1963), and cytogenetics of chemosterilization (RAI 1964a,b; RAI and SHARM...

It is difficult to speak with scientific restraint of the contributions of Edgar Allen to mankind. It is perhaps enough to say that here in New Haven the important school of anatomists, which knew his influence, thrives with vigor, and that his work has profoundly influenced biology universally, as will be apparent later in this lecture. Sexual maturity, in addition to conferring certain biolog...

ENETIC evidence of crossing over between the sex chromosomes of G heterogametic individuals (XU males and WZ females) is so rare in animals as to give special significance to additional data on this occurrence. AIDA (1921) has shown in the Japanese ricefield killifish, Aplocheilus, that the X and Y chromosomes of the male occasionally cross over. In 1930 he presented additional data on this, to...

“Dear Dr. Grenz,” the letter began. “Please excuse the notebook paper and my handwriting. I would have used my computer and printer to write to you but due to my demise, ̃nancially, I’ve had to sell my printer to put food on the table. . . . Several weeks ago I was browsing the book shelf of a local Christian book store, when your book Betrayal of Trust [which deals with clergy sexual misconduct...

We know that formants typically differ between voice categories. It is reasonable to assume that differences exist also regarding the glottal voice source. The purpose of the present investigation was to map such voice source differences in representatives of three different male voice categories. Data are presented on subglottic pressure (as estimated from oral pressure during /p/-ccclusion) o...

In their PNAS article, Joel et al. (1) demonstrate extensive overlap between the distributions of females and males for many brain characteristics, measured across multiple neuroimaging modalities and datasets. They pose two requirements for categorizing brains into distinct male/female classes: (i ) gender differences should appear as dimorphic form differences between male and female brains, ...

BARBARA DUDEN, The woman beneath the skin: a doctor's patients in eighteenth-century Germany, transl. Thomas Dunlap, Cambridge, Mass., and London, Harvard University Press, 1991, pp. viii, 241, £19.95 (0-674-95403-3). Readers of German will already be familiar with Barbara Duden's pathbreaking study of the female patients of an eighteenth-century provincial medical man of Saxony (it was publish...

The pattern of results from the studies reviewed above indicates that alcohol, morphine, nicotine, marijuana, and possibly cocaine can influence reproductive aspects of the neurobehavioral sexual differentiation process to varying degrees. However, with the exception of alcohol, little is currently known regarding the effects of these drugs on nonreproductive sex-related behaviors. Future studi...

As Marek Glezerman (1) rightly points out, there are differences between females and males in brain and behavior. Glezerman overlooks, however, the fact that such differences may be different and even opposite under different environmental conditions. That is, what is typical under some conditions in a brain composed of cells with an XX chromosomal complement residing in a body with low levels ...