منابع مشابه
Sexual conflict in hermaphrodites.
Hermaphrodites combine the male and female sex functions into a single individual, either sequentially or simultaneously. This simple fact means that they exhibit both similarities and differences in the way in which they experience, and respond to, sexual conflict compared to separate-sexed organisms. Here, we focus on clarifying how sexual conflict concepts can be adapted to apply to all anis...
متن کاملAn autosomal or X linked mutation results in true hermaphrodites and 46,XX males in the same family.
It is now well established that the differentiation of the primitive gonad into the testis during early human embryonic development depends on the presence of the SRY gene. However, the existence of total or partial sex reversal in 46,XX males with genetic mutations not linked to the Y chromosome suggests that several autosomal genes acting in association with SRY may contribute to normal devel...
متن کاملDioecy, hermaphrodites and pathogen load in plants
Sex-specifi c investment in pathogen resistance and immunity has been widely reported in animals and to a much lesser degree in plants. Here, we investigated the incidence of fungal pathogens in dioecious versus hermaphroditic plant species. We found that direct studies on diff erences between males and females in disease resistance or pathogen incidence were rare or non-existent in plants, but...
متن کاملSexually antagonistic polymorphism in simultaneous hermaphrodites.
In hermaphrodites, pleiotropic genetic trade-offs between female and male reproductive functions can lead to sexually antagonistic (SA) selection, where individual alleles have conflicting fitness effects on each sex function. Although an extensive theory of SA selection exists for dioecious species, these results have not been generalized to hermaphrodites. We develop population genetic models...
متن کاملHermaphrodites and the medical invention of sex
extent this may be attributable to the very different situation in Scandinavia: Ottesen-Jensen ("Ottar" to her friends and colleagues) was operating in smaller and far more socially homogenous countries than the UK or the USA, lacking in particular the powerful Roman Catholic lobby against which both Stopes and Sanger had to struggle. There is also, of course, a belief that the Nordic countries...
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ژورنال
عنوان ژورنال: The Keio Journal of Medicine
سال: 1964
ISSN: 1880-1293,0022-9717
DOI: 10.2302/kjm.13.143