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Illustrated by in-depth empirical research from Kenya, this book gathers much-needed statistics and data, and then critically examines the features of tourism and the sex trade, contextualizing this in relation to tourism development..
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The Genetical Theory of Natural Selection by R.A. Fisher (1930) dictated that sexual dimorphisms may depend upon a single medelian factor. This could be true for some species but his suggestion could not take off the ground as gender in Drosophila is determined by the number of X chromosomes. Technical advances in molecular biology have revived the initial thinking of Fisher and dictate that TDF or SRY genes in humans or Tdy in mice are sex determining genes. The fortuitous findings of XX males and XY female, which are generally termed sex reversal phenomenon, are quite bewildering traits that have caused much amazement concerning the pairing mechanism(s) of the pseudoautosomal regions of hu...
The question of why organisms reproduce sexually is still a matter of controversy. In this account, Professor Maynard Smith considers the selective forces responsible for the origin and evolution of sexual reproduction and genetic recombination, using quantitative population genetics arguments to support his ideas. The relative importance of individual and group selection processes are also considered. the aim is to give a clear statement of the theoretical issues, and present enough of the evidence to show what kinds of facts are relevant. It is hoped that where crucial evidence is missing, experimentalists and field workers may be encouraged to collect the relevant data. The author does not claim to solve all the problems he raises, but this clear and well-argued account should provide stimulating reading for advanced undergraduate students and research workers in evolutionary theory.
A progressive, effective, and responsible approach to sex education for parents and teens that challenges traditional teaching models and instead embraces 21st century realities by promoting healthy sexuality, values, and body image in young people. Sex education today generally falls into one of two categories: abstinence-only or abstinence-based education—both of which tend to withhold important, factual information and leave young adults ill-equipped to make safe decisions. Al Vernacchio, a high school sexuality educator who holds a Master's degree in Human Sexuality from the University of Pennsylvania, has created a new category: sex-positive education. In For Goodness Sex, he refutes ...
A Stanford University Press classic.
This varied and impressive volume is a record of the major presentations at the NATO Advanced Research Workshop on the Development of Sex Differences and Similarities in Behavior held at Chateau de Bonas, Gers, France, July 14-18, 1992."
When it comes to sex and love, how do you fit in? Are you...ahem, normal? Do you conform to the type, standard or pattern, the way MOST people do? In the bedroom--and elsewhere where we copulate--we're both entirely predictable and utterly surprising. *Would you try to conceive without your partner's consent if you wanted a baby? *What's sexier: suits, slacks, or jeans? *Do you slant to the right or left when kissing? *Have you ever lied to get a date? Marketing guru Bernice Kanner has spent many years researching how Americans love and lust to give us the statistics to satisfy our every curiosity. People talk about sex a lot--a worry about it even more. So pull up a chair and see how you compare...