Paired chromosomes during meiosis. (IMAGE) Stowers Institute for Medical Research Caption Essential A chromosomes are in magenta and B chromosomes are cyan. Credit Stowers Institute for Medical Research Usage Restrictions No restrictions. License Public Domain 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.