For sexual reproduction to yield healthy offspring, newly generated oocytes—immature egg cells—must receive the correct amount of DNA after cell division. This process of segregating chromosomes ...

How is the same process responsible for genetic recombination and diversity also the cause of aneuploidy? Understanding the steps of meiosis is essential to learning how errors occur. Researchers' ...

The completion of mitosis is governed by the dephosphorylation of cyclin-dependent kinase (Cdk) substrates and by the ubiquitination of anaphase-promoting complex (APC) substrates. The order in which ...

This important study implicates that changes in cell regulation may contribute to the evolution of multicellularity. The evidence supporting the conclusions is convincing, with rigorous methods used ...

Level 1 Snow Emergency: Roadways are hazardous with blowing and drifting snow. Roads are also icy; drive carefully. Level 2 Snow Emergency: Roadways are hazardous with blowing and drifting snow. Only ...