Chromosome Crossovers (IMAGE) University of California - Davis Caption This shows chromosome pairs entwined during crossover, a key step in meiosis. Green spots show the location of RNF212, a protein now shown to be important in initiating and stabilizing crossovers. Credit Neil Hunter, UC Davis Usage Restrictions May be used with acknowledgement of the source. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.