1. Mendelian Genetics Using Dihybrid crosses
6F predict possible outcomes of various genetic combinations such as monohybrid crosses, dihybrid crosses and non-Mendelian inheritance;

2. Introduction to Genetics

3. Warm up activity
Answer the following question in your journal. You must have at least 5 complete sentences. What traits do you share with your parents and/or siblings?

4. Vocabulary Activity
Using your iPad, complete your graphic organizer by scanning each of the QR codes around the room.

5. I. Gregor Mendel (1822-1884) Austrian monk
Studied the traits of pea plants
“Father” of modern genetics

6. More Vocab
Hybrids-The offspring of crosses between parents with different traits
Genes – sequence of DNA that codes for a protein and thus determine traits
Alleles – One of a number of a different forms of a gene
dominant allele : An allele that expresses its phenotypic effect even when heterozygous with a recessive allele
Recessive allele :an allele that produces its characteristic phenotype only when its paired allele is identical

7. Mendel’s Experiment
The hybrids (F1 gen.) only displayed one of the parental traits. (tall)
So Gregor wondered why didn’t any of the hybrids come out short??????

8. When crossing two hybrids, some of the resulting offspring (F2 gen
When crossing two hybrids, some of the resulting offspring (F2 gen.) displayed tall, and one displayed short.
Traits are encoded on genes???

9. Alleles – One of a number of a different forms of a gene
dominant allele : An allele that expresses its phenotypic effect even when heterozygous with a recessive allele
Recessive allele :an allele that produces its characteristic phenotype only when its paired allele is identical

10. Dominant vs. Recessive
Dominant= T
Recessive = t

11. Homo - Same Hetero - Opposite Pheno – Physical Geno - Genetic
Allele Types
Homo - Same
Hetero - Opposite
Pheno – Physical
Geno - Genetic

12. Allele Types Definitions
Homozygous  Organisms that have two identical alleles for a particular trait (TT or tt)
Heterozygous  Organisms that have two different alleles for same trait (Tt)
Phenotype Physical characteristic of an organism
(tall , round, short, wrinkled, etc)
Genotype Genetic makeup of an organism (Tt, tt, TT )

13. Probability
The likelihood that a particular event will occur,

14. Punnett Squares
Punnett squares can be used to predict and compare the genetic variations that will result from a cross.

15. Punnett Square
Complete the Punnett square to show the possible gene combinations for the F2 offspring.

16. Aha! and Huh?
Write down 1 or 2 “ahas” (something you learned) and 1 or 2 “huhs” (things you still have questions about) (have them share with elbow partners)

17. APPLICATION of GENETIC VOCABULARY

18. Either use whiteboard or iPad to answer the following:
Identify the following as genotypes or phenotypes:

19. Genotypes or PhenotypesTt
green bb
3 toes

20. Homozygous or heterozygous
Describe as:
Homozygous or heterozygous
Dominant or recessive

21. gg CC Dd tt Jj EE

22. Predict the phenotype if brown (B) is dominate to blue.BB bb Bb

23. Give the genotypes for the following using ‘A’ as the dominate allele and ‘a’ as the recessive allele:
Homozygous dominant
Homozygous
Heterozygous
Recessive
Hybrid
Homozygous recessive
Dominant

24. Dihybrid Crosses-Interactive lesson
Mechanisms of Genetics II
6F (2 of 5)
Punnett Squares

25. Dihybrid Cross Practice
Each student will get a template and dry erase marker Complete the cross List all the possible genotypes and phenotypes Write out all the possible phenotypes in words Apply to practice MC question

26. Example
9/16=56.25%
3/16=18.75%
1/16=6.25%

27. EOC Biology 2015