Tired of watering the garden your instructor is attempting t

Tired of watering the garden, your instructor is attempting to grow desert plants. One such plant is Indian paintbrush. A yellow variant has shown up, and we would like to determine if this variant is a Mendelian trait. We have taken a pure breeding red plant and crossed it with a a pure breeding yellow plant. The resulting F1 plants were selfed and the F2 data is presented below: Red Flowers 111 Yellow Flowers 53 Perform a chi square analysis on this data using the following hypothesis: The mode of inheritance for flower color in Indian paintbrush plants is simple Mendelian. What is the calculated chi-square value? Round to three decimal places.

Solution

expected value = 111+53 / 2 = 82

X^2 = [ 111- 82 ]^2 / 82    + [ 53 - 82] ^2   /   82

X^2 = 10.256 + 10.256

X^2 = 20.512