2. Genetics Notes Day 2 Warm Up – What is the difference between a genotype and a phenotype? Give an example of each.

3. Bring in your PHOTOS!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! We are doing “Throw Back Thursday” this week!

4. A diagram that predicts the expected outcome of a genetic cross.

5. Helps you keep track of traits. Punnett Squares

6. . Dominant and recessive alleles are represented by letters. Punnett Squares

7. A capital letter (T) is used for dominant alleles. Punnett Squares

8. A lowercase letter (t) is used for recessive alleles. Punnett Squares

9. Example (Tall or short) T = dominant allele t = recessive allele Homozygous dominant – Genotype = _____ Phenotype = __________ Heterozygous – Genotype = _____ Phenotype = __________ Homozygous recessive – Genotype = _____ Phenotype = __________

10. If you wanted to know the type of offspring a cross between two parents would produce, you can use a punnett square. Tt x Tt TT,Tt for tall Tt for short Punnett Squares

11. The letters representing the alleles from one parent are placed along the top of the square. T t Punnett Squares

12. The letters representing the two alleles from the second Parent are places along the side of the square. T t Punnett Squares

13. T t x T t T t T t Punnett Squares

14. Squares are filled by writing the letter at the top beside the letter on the side. TT Tt t t T t T t

15. Punnett Squares The letters in each of the squares represents the Genotypes of the offspring that the parents could produce. TT Tt t t T t T t TT Tt Tt t t

16. The genotype (genetic makeup) can be used to predict the phenotype (physical appearance) of the offspring. Punnett Squares

17. Genotype Phenotype TT tall Tt tall t t short Punnett Sqaures

18. Punnett Squares Probability: the ratio that a particular event could occur. out of 4 offspring 3 would be tall 1 would be short

19. Punnett Squares: Help you keep track of traits. Predict genotype and phenotype. Calculate probability.

20. Bb BB x bb bb B Genotypes: Bb, Bb, Bb, Bb Phenotypes: All brown Probability: 100%

21. BBBb BB Bb BB x Bb Bb B Genotypes: BB, BB, Bb, Bb Phenotypes: All brown Probability: 100% brown

22. Genetics Notes Day 3 Warm Up: Create a Monohybrid cross from these parents: Dad = heterozygous for Brown Eyes Mom = homozygous recessive for Blue Eyes

23. Bbbb Bbbb B b b b

24. Dihybrid Crosses A cross that involves two pairs of contrasting traits. – RrYy crossed with RrYy – RY Ry rY ry

26. BBffx BBFF BfBfBfBf BFBFBFBF

28. TtrrxttRr TrTrtrtr tRtrtRtr