Sixty years since the double helix structure of DNA was discovered! Ten years since the human genome was mapped!
From the Centers for Disease Control and Prevention (CDC) website: “National DNA Day is a special day when teachers, students, and the public can learn more about genetics and genomics. The National Human Genome Research Institute (NHGRI) at the National Institutes of Health has sponsored DNA Day for the past nine years, to commemorate the completion of the Human Genome Project in April 2003 and of Watson and Crick’s discovery of the double helix structure of DNA.”
To celebrate DNA Day, we are reducing our price on DNA-related apps to 99¢ for the day (with comparable price reductions on app stores for every country). The apps to be priced at 99¢ on April 25 are:
OnScreen DNA Model for iPad (regularly $3.99)
OnScreen DNA Model for iPhone (regularly $2.99)
OnScreen DNA Model for Mac (regularly $2.99)
The OnScreen DNA Model apps (on iPad, iPhone, and Mac) focus on the details of DNA’s double helix structure, using a 3D, color-coded, virtual model that the user can rotate and zoom. Explanatory text deals with the molecules and chemical bonds of the double helix. Animations show two important lab and biotechnology phenomena of DNA: denaturation, in which the strands separate, and renaturation, in which they reunite.
OnScreen DNA Replication makes use of the same DNA model to show how, through the action of specific enzymes, a DNA molecule is perfectly duplicated before cell division. The various steps in the process, including the action of telomerase to prevent strand shortening, are shown in 3D animations and described in some detail.
OnScreen Gene Transcription makes use of the same DNA model to show how a genetic recipe stored in the sequence of molecules of DNA is copied by construction of a messenger RNA molecule. The various steps in the process, shown in 3D animations that make it clear that messenger RNA is constructed as part of a hybrid RNA/DNA double helix, not a 2D ladder, are described in some detail, emphasizing the role of certain enzymes.
The apps show details of structure and processes that are sometimes depicted in erroneous ways in places that should know better. Animations make the processes memorable. Discussion of the chemistry involved is at an introductory level, so the apps are useful for learning about DNA to a wide range of students or anyone interested in the science of Life. There really is nothing comparable on the internet.
For iPad users, DNA Day is a chance to get all three OnScreen Science’s DNA apps for less than the regular price of OnScreen DNA Model alone. The apps work great and look great on an iPad Mini.
Educational purchasers enrolled in Apple’s Volume Purchase Program still get 50% off the sale price when buying twenty or more copies at a time.
Spread the word. This is a one-day-only sale.