In pigs, erect ears is dominant (E) to drooping ears (e).  The gene for ear position is autosomal. A farmer performs a test cross on an erect eared sow (female pig).    Explain the purpose of a test cross and describe the other individual involved in the cross.

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Chapter20: Chromosomes And Human Genetics
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Problem 7CT: The following pedigree shows the pattern of inheritance of red-green color blindness in a family....
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In pigs, erect ears is dominant (E) to drooping ears (e).  The gene for ear position is autosomal.

A farmer performs a test cross on an erect eared sow (female pig). 

 
Explain the purpose of a test cross and describe the other individual involved in the cross. 
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