How Molecules Work to Make and Shape a Cell Forward arrow iconAn arrowing pointing forward, usually indicating forward movement, or the ability the share something via social media. Close iconAn icon showing an uppercase letter "X", indicating that this will close the current element. Share Facebook iconAn icon representing the Facebook social media site. Twitter iconAn icon representing the Twitter social media site. LinkedIn iconAn icon representing the social media service LinkedIn. Printer iconAn icon showing a printer, indicating the ability to print the associated media. Print Video37:00Developmental biologist Mary Baylies discusses the mechanisms that drive cells and how genetic approaches in flies have allowed us to find the fundamental genes and mechanisms driving muscle morphogenesis.