A fly model establishes distinct mechanisms for synthetic CRISPR/Cas9 sex distorters

Horizontal transfer of parasitic sex ratio distorters between crustacean hosts.

Parasitic sex distorters were artificially transferred within and between crustacean host species in order to study the effects of parasitism on host fitness and sex determination and to investigate parasite host specificity. Implantation of Nosema sp. to uninfected strains of its Gammarus duebeni host resulted in an active parasite infection in the gonad of recipient females and subsequent tra...

Intragenomic conflict produces sex ratio dynamics that favor maternal sex ratio distorters

Maternal sex ratio distorters (MSDs) are selfish elements that enhance their transmission by biasing their host's sex allocation in favor of females. While previous models have predicted that the female-biased populations resulting from sex ratio distortion can benefit from enhanced productivity, these models neglect Fisherian selection for nuclear suppressors, an unrealistic assumption in most...

investigating the feasibility of a proposed model for geometric design of deployable arch structures

deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...

Sex on the Fly

An American was sitting in a Paris cafe eating soup when a fly dropped into her bowl. ‘‘There’s un mouche in my soup!’’ she exclaimed. A nearby waiter corrected her. ‘‘Non, Madame. Une mouche.’’ The American replied, ‘‘Wow, you French have good eyes!’’ Although flies look pretty much alike to most people, to scientists working with Drosophila melanogaster fruit flies under a dissecting microsco...

Reaction Mechanisms of Metalloenzymes and Synthetic Model Complexes Activating Dioxygen Reaction Mechanisms of Metalloenzymes and Synthetic Model Complexes Activating Dioxygen