Two pure lines of Nicotianum (tobacco)have significantly different corolla lengths.In line 1,the average length is 30 mm,ranging from 25 mm to 35 mm with a variance of 10.In line 2,the average corolla length is 60 mm,ranging from 45 mm to 65 mm with a variance of 12.The F₁ has a corolla length of 45 mm,ranging from 40 to 50,and the variance is 9.Upon selfing,an F₂ is produced that has an average flower length of 45 mm,but ranges from 10 mm to 80 mm with a variance of 55.
a)Provide a general explanation of these results.
b)Calculate the broad-sense heritability (H²)for corolla length in this study.

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The Answer of Two pure lines of Nicotianum (tobacco)have significantly different corolla lengths.In line 1,the average length is 30 mm,ranging from 25 mm to 35 mm with a variance of 10.In line 2,the average corolla length is 60 mm,ranging from 45 mm to 65 mm with a variance of 12.The F₁ has a corolla length of 45 mm,ranging from 40 to 50,and the variance is 9.Upon selfing,an F₂ is produced that has an average flower length of 45 mm,but ranges from 10 mm to 80 mm with a variance of 55. a)Provide a general explanation of these results. b)Calculate the broad-sense heritability (H²)for corolla length in this study.

Two Pure Lines of Nicotianum (Tobacco)have Significantly Different Corolla Lengths