6. The film describes two independent sources of evidence that have been used to estimate when maize was
first domesticated: genetic evidence and archaeological evidence. Do these two sources of evidence support
each other? Explain your answer.
7. To demonstrate how two different genes can explain the different traits in teosinte and maize, Dr. Doebley
and colleagues used careful breeding to transplant each gene from one type of plant to the other. In the
table below, draw and/or describe the results of each cross and explain what you can infer about the
function of the genes.
Revised January 2018
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Evolution
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