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Subject A Subject B Subject C Genotype for Fur Color GG Gg gg PhenotypeSubject A Subject B Subject C Genotype for Fur Color GG Gg gg Phenotype for Fur Color Gray Fur White Fur

Subject A Subject B Subject C Genotype for Fur Color GG Gg gg PhenotypeSubject A Subject B Subject C Genotype for Fur Color GG Gg gg Phenotype for Fur Color Gray Fur White Fur

 • Mendel concluded only one allele is passed from parent to offspring for • Mendel concluded only one allele is passed from parent to offspring for each trait. • We show this using Monohybrid Punnett Squares

 • Because organisms are made up of more than one trait, Mendel concluded • Because organisms are made up of more than one trait, Mendel concluded that the inheritance of one trait does not influence the inheritance of a second trait. • Example: Height of the pea plant does not influence the color of the peas – Height is independently assorted from color. • We show this using Dihybrid Punnett Squares.

GGBb (male) × Gg. Bb (female) G   G G   GGBb (male) × Gg. Bb (female) G G G g B b B b. G G G g B B B b b b

G   g g    g G    GG g g g G G g gg g B b B BB b Gg. Bb (male) × gg. BB (female)

GGBb (male) × Gg. Bb (female) G   G G   GGBb (male) × Gg. Bb (female) G G G g B b B b. G G Solid Gray Fur G g Solid Gray Fur B BGreen eyes B b. Green eyes b b Blue eyes. Only 75% of the offspring will have green eyes.

GGBb (male) × Gg. Bb (female) G   G G   GGBb (male) × Gg. Bb (female) G G G g B b B b. G G G g B B B b b b

Gg. Bb (male) × Gg. Bb (female) G   g G  Gg. Bb (male) × Gg. Bb (female) G g G g B b B b. G G Solid Gray Fur G g Solid Gray Fur g g. Striped Gray Fur B BGreen eyes B b. Green eyes b b Blue eyes

Gg. Bb (male) × Gg. Bb (female) G   g g  Gg. Bb (male) × Gg. Bb (female) G g g g B b B b. G g g g B B B b b b

Gg. Bb (male) × Gg. Bb (female) B   b b  Gg. Bb (male) × Gg. Bb (female) B b b b B b b b. G g g g G g g g