The blending theory would predict that the phenotype seen in the F₁ generation from a cross between a pure breeding plant with dark purple flowers and a pure breeding plant with white flowers would be __________. A)dark purple B)light purple C)white D)a 3:1 ratio of purple to white flowers E)a 1:1 ratio of purple to white flowers

Question

Quizplus · Accepted Answer

The blending theory has been disproved, and the correct answer can be deduced from the laws of Mendelian inheritance. If the dark purple flowered plant is homozygous dominant (PP) and the white flowered plant is homozygous recessive (pp), then the F1 generation would be heterozygous (Pp) and have purple flowers. When the F1 generation is self-crossed, the resulting F₁ generation would have a 1:2:1 genotype ratio (PP:Pp:pp) and a 1:2:1 phenotype ratio (dark purple:light purple:white). Therefore, the most likely phenotype for the F₁ generation would be light purple.

The Blending Theory Would Predict That the Phenotype Seen in the F1

The Blending Theory Would Predict That the Phenotype Seen in the F₁