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Skip to Content Skip to navigation. Sex determination in the Hymenoptera. N2 - The dominant and ancestral mode of sex determination in the Hymenoptera is arrhenotokous parthenogenesis, in which diploid females develop from fertilized eggs and haploid males develop from unfertilized eggs. We discuss recent progress in the understanding of the genetic and cytoplasmic mechanisms that make arrhenotoky possible.

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De Boer, R. Jansen, J. Koene , A. Ter Maat. We studied the role of the prostate gland in determining the level of male sexual drive in the hermaphroditic pond snail Lymnaea stagnalis. Male sexual drive is high after a period of social isolation and decreases after copulation as a male. A positive correlation exists between the level of male sexual drive and the volume of the prostate gland.
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The prohibition of sexual harassment is anchored in Dutch legislation, yet hardly any litigation is started against sexual harassment. In order to effectively stop sexual harassment, the follow-up action time's up has started in the United States. Is in the Netherlands now also the way open to give effect to the existing rules and to claim justice in the courtroom? During the expert meeting, the ban on sexual harassment in the workplace is central and we take stock of the possibilities of strategic litigation and the legal bumps that come with it. Registration has been closed on 13 April.
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Despite its fundamental role in development, sex determination is highly diverse among animals. Haplodiploid species exhibit diverse but poorly understood mechanisms of sex determination. Some hymenopteran insect species exhibit single-locus complementary sex determination sl -CSD , where heterozygosity at a polymorphic sex locus initiates female development.
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