What is a genotype key?

Would you be able to look at a penny with a compound light microscope? What organ makes good bacteria? Why is silicon dioxide use to make bricks? In chemistry experiment a student by mistake put some magnesium strip in blue coloured copper sulphate solution what change will he observ in colour of the solution.write the reaction also? How much money is spent each year on the Hubble Space Telescope? What earth layer contains the highest percentage of hydrogen? What is the Rf value of any insoluble dye? What is the most important element in determining whether or not a testator intended to revoke their will? How can I find environmentally friendly alternatives to traditional paper towels that are plastic-free, such as reusable cloth towels or compostable paper towels? Is Eileen McShea still doing weather on WEWS? What tools do meteorologist use to study tornadoes? What plate boundary is mount teide on? Do all-stars tern into blackholes when they die? Translation is conversion of an RNA message into a what? What was mercurochrome used for? How is global warming affecting the Antarctic glaciers? What is the value of avogadros number? How can paper chromatography be used to identify an unknown ink? How do you know when there's a unconformity? How does the relative abundance of each hydrogen isotope affects hydrogen average atomic mass?