1. List the four Core Concepts of Biology we discussed in
​   class.
​2.Regarding variables, you change the ____________
   and measure the _______________.  

Chi square problem
In rats, brown fur is dominant to white fur and black eyes are dominant to red eyes. Groups of heterozygote rats are bred. The resulting F1 included 260 rats with brown fur:black eyes, 95 rats with brown fur:red eyes, 100 rats with white fur:brown eyes and 25 rats with white fur:red eyes. Calculate the chi square value for this experiment and determine the "fitness" of this data set.