Swayed by the clear distinction between male and female genitalia, the question of how far these categories extend into human biology has attracted humans for centuries. This question is sometimes being framed as whether the effects of sex are restricted to the genital organs or penetrate the entire organism. Here I argue that the two questions are not equivalent and that whereas the answer to ...

The Arvicolidae is a widely distributed rodent group with several interesting characteristics in their sex chromosomes. Here, we summarize the actual knowledge of some of these characteristics. This mammalian group has species with abnormal sex determination systems. In fact, some species present the same karyotype in both males and females, with total absence of a Y chromosome, and hence of SR...

The strategy developed for sex determination in skeletal remains is to amplify the highly degraded DNA, by use of primers that span short DNA fragments. To determine sex of unembalmed human cadaveric skeletal fragments from Sokoto, North-western Nigeria, using Polymerase Chain Reaction (PCR). A single blind study of Polymerase Chain Reaction (PCR)-based sex determination using amelogenin gene a...

The phenomenon of how tests influence teaching and learning is commonly described as “wash back” in language instruction.  Literature indicates that wash back effect is a complex concept that becomes even more complicated under different interpretations of the wash back phenomenon in teaching and learning. In the present study, some definitions of wash back and its two major types were introduc...

background the pre-marital sex and live-in relationship among young people are increasing at an alarming rate. remote consequences of such high risk behaviors are increase in the incidence of stds (including hiv), unsafe and illegal abortion, adolescent pregnancy and motherhood, single mother child/abandoned child, juvenile delinquency and many more. objectives the aim of this study was to inve...