1. DO NOW Pick up a Sponge Bob punnett square practice Put your name on it DO NOT START IT YET

2. Punnett Square

4. Vocab Homozygous/Purebred – RR, rr, gg, TT Heterozygous/Hybrid – Rr, Tt, Gg Dominant – Capital Letter Recessive – lowercase Genotype – Letter combos (GG, Gg, Tt) Phenotype – Physical Characteristics

5. Your Job Complete the punnett square practice Complete your traits lab and hand it in

6. DO NOW Take out your Sponge bob practice and look over the keys Circle any questions you have

7. Do Now – Class 3 Open to a blank sheet of paper in your notebook Label it – Punnett Square Practice

8. Punnett Square Practice Problems

9. Vocab Homozygous/Purebred – RR, rr, gg, TT Heterozygous/Hybrid – Rr, Tt, Gg Dominant – Capital Letter Recessive – lowercase Genotype – Letter combos (GG, Gg, Tt) Phenotype – Physical Characteristics

10. Problem 1 Create a punnett square to determine percent probabilities of genotypes and phenotypes of the offspring of a pea plant with yellow pods crossed with a plant that is heterozygous for pod color. (Green pod (G) color is dominant.)

11. Phenotype ratios Green pods 50% Yellow pods 50% GgGg g g Gg gg Gg Genotype ratios Gg 50% gg 50%

12. Problem 2 Create a punnett square to determine percent probabilities of genotypes and phenotypes of the offspring of two pea plants that are both heterozygous for seed shape. (Round shape(R) is dominant over wrinkled.)

13. Phenotype ratios Round seeds 75% Wrinkled seeds 25% RrRr R r rr Rr RR Genotype ratios RR 25% Rr 50% rr 25%

14. Problem 3 Create a punnett square to determine percent probabilities of genotypes and phenotypes of the offspring of two pea plants that both are homozygous for yellow seed color. (Yellow color (Y) is dominant over green.)

15. Phenotype ratios Yellow seeds 100% YYYY Y Y Genotype ratios YY 100%

16. Problem 4 Create a punnett square to determine percent probabilities of genotypes and phenotypes of the offspring of a pea plant that is homozygous for yellow seed color with a plant with green seeds. (Yellow (Y) color is dominant over green.)

17. Phenotype ratios Yellow seeds 100% yyyy Y Y Yy Genotype ratios Yy 100%

18. Problem 5 Create a punnett square to determine percent probabilities of genotypes and phenotypes of the offspring of a pea plant that is homozygous for green pod color with a plant that is heterozygous for pod color. (Green pod color is dominant (G) over yellow.)

19. Phenotype ratios Green pods 100% GgGg G G Gg GG Gg GG Genotype ratios GG 50% Gg 50%