1. Marcellin Biology Notes
Unit 6 Genetics

2. Gregor Mendel “Father of Genetics” Studied genetics using pea plants
Genetics- the passing on of traits from parents to children

3. Mendel’s Experiment: Traits in Question

4. The Study of Genetics Dominant Trait- the “overpowering” trait
Represented by an uppercase letter (ex. A, B, D, etc.)
Recessive Trait- the weak trait
Represented by a lowercase letter (ex. a, b, d, etc.)

5. Modeling Mendel Every individual must get 2 traits. 1 from Mom
1 from Dad

6. Modeling Mendel Eye color B (brown eyes)= dominant trait
b (blue eyes) = recessive trait
BB = Pure dominant = brown eyes
bb = Pure recessive = blue eyes
Bb = Hybrid = brown eyes- B dominates over b, so the overpowering trait appears in the child.

7. Mendel’s Experiment Spherical seed shape Yellow seed color
Dominant traits
Recessive traits
Spherical seed shape
Yellow seed color
Purple flower color
Dented seed shape
Green seed color
White flower color