1. EQ: How do genes influence the variety of organisms that exist?
Non-Mendel Genetics
EQ: How do genes influence the variety of organisms that exist?

2. Review Mendel Two types of alleles? Dominant and recessive
Each gene requires 2 alleles
Three allele combinations?
Homozygous Dominant (HH)
Heterozygous (Hh)
Homozygous recessive (hh)
Three Mendel's laws of inheritance
Law of Dominance
Law of Segregation
Law of Independent Assortment

3. Mendel Review Monohybrid cross Dihybrid cross Mono = one
Examine inheritance of one trait
Punnett square with 4 grid boxes
Grid boxes have 2 alleles (1 trait)
Di = two
Examine inheritance of two traits
Punnett square with 16 grid boxes
Grid boxes contain 4 alleles (2 traits)

4. Non-Mendelian Genetics
There are a few types in inheritance patters that go beyond what Mendel discovered:
Incomplete Dominance,
Codominance,
Polygentic

5. rr RR Rr Genotype = heterozygous
Incomplete Dominance
Genotype = heterozygous   
Neither allele has complete dominance over the other, which results in a third phenotype.
Heterozygous phenotype = mix/blend of the two parent alleles rr
Tricks to help students remember: The two phenotypes meet in the middle of or intermediate = incomplete dominance. RR Rr
Homozygous dominant
Homozygous recessive
Heterozygous
RED
WHITE
PINK

6. r Incomplete Dominance r Rr Rr R Rr Rr R
Using Mendel's laws of segregation and independent assortment, cross a Red flower (RR) with a white flower (WW)
What are the possible genotypes and phenotypes of the offspring?
Geno: 4 heterozygous (blend both dominant alleles)
Pheno: 4 pink flowers r r Rr R Rr Rr Rr R

7. Heterozygous genotype Neither allele is dominant nor recessive
Codominance
Co = together
Heterozygous genotype
Neither allele is dominant nor recessive
Phenotype- Both alleles fully and separately expressed (visible)
Erminette

8. Non-Mendelian Genetics – Codominance
A red colored flower (RR) is crossed with a white colored flower (WW). 
Use Mendel's laws of segregation and independent assortment to complete the Punnett square.
What are the possible genotypes and phenotypes of the offspring?
 Genotype: 4 heterozygotes (RW) 
Phenotype: 4 red and white flowers W W RW
Use collaborative strategies while having students answer the last question.
Answer: 1 red flower, 1 white flower and 2 red and white flowers R RW R RW RW

9. Don’t lose your marbles
C – level 2 voice
H – ask 3 then me
A – complete the activity with your partner
M- remain seated at your assigned table
P – complete your activity sheet
Success

10. Non-Mendelian Genetics – Polygenic Inheritance
What do you think poly- means?
What do you think –genic means?
Polygenic inheritance is expressed when multiple genes each make a small contribution to the overall phenotype.   
Allows for more than 2 or 3 variations in expressed phenotypes
For example, skin color ranges from very fair to very dark skin shades.  
At least 378 genes are involved in determining skin color.

11. Non-Mendelian Genetics – Polygenic Inheritance
Punnett squares are complicated for polygenic inheritance.
Other factors are involved with polygenic traits.
Environment, nutrition
Other polygenic traits:
Height, eye color, hair color and body shape

12. Polygenic traits C- level 2 voice H- ask 3 before me
Eye color is another example of polygenic trait.
C- level 2 voice
H- ask 3 before me
A- complete polygenic lab
M- remain seated at your table
P- place lab on left side of INB
Success

13. Exit ticket
Clear your desk