This section of the website is Priscilla's doing. She is a former trial lawyer and piano player and is embarrassed to say she did not pay close enough attention in her science classes in high school. So she went out on the web looking for places to read about the genetics of inheritance in order to understand why it is that Grace gave us a light-phase ram lamb and Celadon surprised us her first year with a black lamb. She found three sources of just the right amount of knowledge to make her more comfortable about what's going on with color and horns and other characteristics of her Soay, without falling into the black hole of academic genetics that swallowed up Steve over 35 years ago. Here are Priscilla's suggestions:
Morgan is a multimedia tutorial from Rutgers University that covers the basic principles of genetics. You can work through it at your own pace, go back and review, and take short quizzes to see if you “get it.”
Dr. Steven Carr, Department of Biology, Memorial University in Newfoundland, Canada, has put together a dandy one-page chart of Mendelian rules summarizing the jargon and basic rules of inheritance. It's a little intimidating at first, but if you work your way carefully through the chart and the definitions, you will end up smarter at the end of the page than when you started. A nice place to look back at for reference when someone starts yattering about "double heterozygotes" just when you are trying to finish cooking dinner.
The American Mathematical Society has put out a detailed but not overly intimidating summary of molecular biology and genetics on the web, and it is a good "next step" after the first two sources. You will need to read it when you are rested, as the typeface is maddeningly small and there are no pictures to make it more fun, but it is rich in content and provides an overall context for the narrower issues of horn shape and fleece color.