Prereq: BI 755, 756; MS 753; and consent of instructor. Introduction to the basic theory and practice of an approach applicable to many cell biology problems. Covers the following topics: early mouse development; gene targeting into mouse embryos; homologous recombination in embryonic stem cells; review of practical aspects of the transgenic technology; review of selected studies employing transgenic mice and chimeric (gene knockout) mice. Offered alternate years. 2 cr, 2nd sem.