Genetics Problem (Chi-Square problem) Please help?

Posted on 2016-11-21 18:49:00 in Biology by AUSTIN

A research geneticist is trying to determine if the vestigial wing gene in fruit flies is inherited in a Mendelian fashion. The scientist breeds a true breeding normal winged fly with a true breeding vestigial winged fly. The scientist then lets the F1 generation freely breed offspring and counts the number of normal and vestigial winged offspring produced. The following numbers are recorded: 985 winged flies, 278 vestigial winged flies. Is this gene inherited in a Mendelian fashion? 

What are the? 
Degrees of freedom: 
Test statistic: 
Chi-square critical value: 

Is the gene inherited in a Mendelian fashion? Yes or No 

I dont understand this at all, please help?

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