Suppose for a few minutes that you are a geneticist during the 1920's or 1930's when certain facts about tomatoes are unknown. (The unknown facts are that the color of the fruit and the height of the plant are genetically determined with red dominant over yellow, and tall dominant over short.) One fact that you do know if the offspring of a particular pairing result in a 9:3:3:1 ratio, you'll get a publication out of it. (Note: 9:3:3:1 is a shortcut way to write 9/16, 3/16, 3/16, 1/16.) You carry out the crossings and find 89 tall reds, 39 short reds, 39 tall yellows, and 19 short yellows. Use a $\chi$² to determine if these data fit a 9:3:3:1 model.

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The Answer of Suppose for a few minutes that you are a geneticist during the 1920's or 1930's when certain facts about tomatoes are unknown. (The unknown facts are that the color of the fruit and the height of the plant are genetically determined with red dominant over yellow, and tall dominant over short.) One fact that you do know if the offspring of a particular pairing result in a 9:3:3:1 ratio, you'll get a publication out of it. (Note: 9:3:3:1 is a shortcut way to write 9/16, 3/16, 3/16, 1/16.) You carry out the crossings and find 89 tall reds, 39 short reds, 39 tall yellows, and 19 short yellows. Use a $\chi$² to determine if these data fit a 9:3:3:1 model.

Suppose for a Few Minutes That You Are a Geneticist χ\chiχ

Suppose for a Few Minutes That You Are a Geneticist $\chi$