Question: Genetics. Two human traits controlled by a single gene are the ability to roll one s tongue and whether one s ear lobes are free

Genetics. Two human traits controlled by a single gene are the ability to roll one s tongue and whether one s ear lobes are free or attached to the neck. Genetic theory says that people will have neither, one, or both of these traits in the ratio 1:3:3:9 (1 attached, noncurling; 3 attached, curling; 3 free, noncurling; 9 free, curling). An Introductory Biology class of 122 students collected the data shown. Are they consistent with the genetic theory? Test an appropriate hypothesis and state your conclusion.

Variable Coefficient SE(Coeff)

Intercept 1676 29.30 calcium 23.23 0.48 Trait Attached, Attached, Free, Free, noncurling curling noncurling curling Count 10 22 31 59

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