2. Analyzing Traits in Fast Plant Generations

3. Lesson Goal  By the end of this lesson, you should be able to describe the way that traits are passed down from one generation to the next.

4. Collecting Data  One person from each group collect your plant dish from the light area.  As a group, count the number of purple, non- purple, and/or other colored plants that you have.

5. Collecting Data Group # P 1 Purple Non- Purple P 2 Purple Non- Purple F 1 Purple Non- Purple F 2 Purple Non- Purple 1 2 3 4 5 6 7 8 9 10 Totals

6. GENOTYPE : the inherited combination of alleles (the LETTERS) Ex: Dd, BB PHENOTYPE : the inherited appearance (the physical traits you see) Ex: Dimples vs.

7. Collecting Data

8. Analyzing the Data

10.  DOMINANT ALLELE: the trait that always shows up in the organism whenever it is present.  RECESSIVE ALLELE: the trait that is masked, or covered up, whenever the dominant allele is present. DOMINANT RECESSIVE

11. How do we represent alleles? We use a capital letter for dominant alleles We use a lower case letter for recessive alleles D = dominant trait d = recessive trait

12. How do these alleles work? B Bb bb BB Bb bb B

13. Analyzing the Data