Agency: Agricultural Research Service Date Filed: July 24, 1997 Abstract: The invention relates to a sorting nozzle which has two tapered zones with elliptical cross sections. The invention is able to orient and sort a large fraction of asymmetrical or “flattened” cells. This nozzle has a particular application for sorting viable male (Y) and female (X) sperm populations in a cell sorter. Inventors: Lawrence A. Johnson Glenn R. Welch USDA, ARS, BA USDA, ARS, BA Beltsville, MD 20705-2350 Beltsville, MD 20705-2350 (301) 504-8545 (301 504-8545 (301) 504-5123 (fax) (301) 504-5123 (fax) Industry Keywords: biomedical, genes, animal husbandry, biotechnology, veterinary, artificial insemination, chromosomes, sperm