In animals, microtubules and centrosomes direct the migration of gamete pronuclei for fertilization. By contrast, flowering plants have lost essential components of the centrosome, raising the question of how flowering plants control gamete nuclei migration during fertilization. Here, we use Arabidopsis thaliana to document a novel mechanism that regulates F-actin dynamics in the female gametes...

The relative energetic investment in reproduction between the sexes forms the basis of sexual selection and life history theories in evolutionary biology. It is often assumed that males invest considerably less in gametes than females, but quantifying the energetic cost of gamete production in both sexes has remained a difficult challenge. For a broad diversity of species (invertebrates, reptil...

The empirical study byMargaretNelson, RosannaHertz, andWendyKramer on stakeholder attitudes toward gamete donor anonymity and limits on gamete donation, ‘Gamete Donor Anonymity and Limits on Numbers of Offspring: The Views of Three Stakeholders’ (hereafter Gamete Donor Anonymity),1 is commendably particular on one level yet noticeably vague on another. It approaches the anonymity issue2 at a le...

In this paper we introduce the General Adaptable Metric Execution Tool and Environment (GAMETE) to aid the design, measurement, and analysis of cyber-physical systems (CPSs). GAMETE is a general and extensible environment for evaluating and computing metrics associated with the performance and complexity of CPS designs. GAMETE supports a wide array of metrics that it generates over simulation a...

The intertidal brown alga Silvetia compressa releases gametes from receptacles (the reproductive tissue) rapidly upon a dark transfer (following a photosynthesisdependent period in the light, termed potentiation). In this study, the wavelength-dependence of this process was investigated. During the potentiation period in white light (WL), gametes are not released. However, gametes were released...

By harboring male and female functions in the same genome and expressing them in every individual, simultaneous hermaphrodites may incur sexual conflict unless both sex functions can evolve phenotypic optima independently of each other. The first step toward understanding their capacity to do so lies in understanding whether sex functions are phenotypically correlated within individuals, but re...

This Ethics Committee report outlines the interests, obligations, and rights of the parties involved in gamete donation: both male and female donors who choose to provide gametes for use by others, recipients of donated gametes, and any offspring resulting from gamete donation. This document replaces the document "Interests, obligations, and rights of the donor in gamete donation," last publish...