This study examines 1990 residential segregation levels and 1980-1990 changes in segregation for Latinos, Asians, and blacks in U.S. metropolitan areas. It also evaluates the effect of emerging multiethnic metropolitan area contexts for these segregation patterns. While black segregation levels are still well above those for Latinos and Asians, there is some trend toward convergence over the de...

A cytogenetical study on 13 alfalfa (Medicago sativa) cultivars available in Iranian Forest and Rangelands Genebank was performed in order to obtain basic information on the variability in chiasma frequency/distribution, chromosome association and segregation. Such cytogenetic information is useful for planning hybridization programs. Cluster analysis of meiotic data and ordination of cultivars...

Segregation by type of work or discrimination are two common explanations for gender segregation in the workplace. Here, I discuss a third: gender segregation may occur because of referral hiring through segregated social networks. I examine data on the inter-firm gender segregation of employees at US colleges and universities. Using a combination of analytical modeling, empirical estimation, a...

Although trends in the racial segregation of schools are well documented, less is known about trends in income segregation. We use multiple data sources to document trends in income segregation between schools and school districts. Between-district income segregation of families with children enrolled in public school increased by over 15% from 1990 to 2010. Within large districts, between-scho...

The discovery of alleles that are able to distort segregation during meiosis in their favour raises the question of why Mendelian segregation is the rule and segregation distortion the exception. Previous research on this topic was limited by an unrealistic assumption: equal segregation in the two sexes. Ubeda and Haig [(2005) Genetics 170, 1345-1357] provide a new model allowing sex-specific s...

Centromeric DNA is generally composed of large blocks of tandem satellite repeats that change rapidly due to loss of old arrays and expansion of new repeat classes. This extreme heterogeneity of centromeric DNA is difficult to reconcile with the conservation of the eukaryotic chromosome segregation machinery. Histone H3-like proteins, including Cid in Drosophila melanogaster, are a unique chrom...

The announcement this spring followed months of speculation: Kim Nasmyth will assume the Whitley Chair of Biochemistry at the University of Oxford at the start of 2006, taking over from Ed Southern. Nasmyth is presently Director of the Institute of Molecular Pathology (IMP) in Vienna and is well known for his work on the yeast cell cycle and chromosome segregation (for more details see Curr. Bi...

Proper chromosome segregation depends on correct attachments between microtubules and kinetochores. Budding yeast have been thought to achieve these attachments with different kinetics than other eukaryotes. Now, deploying specialized data processing techniques to achieve super-resolution images, Marco et al. demonstrate that this tractable cell-cycle model system shares more similarities with ...