1. Genetics: Punnett Square

2. Benchmarks
SC.912.L.16.1 Use Mendel’s laws of segregation and independent assortment to analyze patterns of inheritance. AA.
SC.912 .L Discuss observed inheritance patterns caused by various modes of inheritance, including dominant, recessive, co-dominant, sex-linked, polygenic, and multiple alleles.

3. Objectives
Students will identify, analyze, and/or predict inheritance patterns caused by various modes of inheritance.
Identify and explain the outcomes of polygenic traits and sex-linked inheritance

4. Ted Talk: Melanin & Human Evolution

5. TED Talk Review
Expert on Skin and Melanin:
Nina Jablonksi
CHALLENGE:

6. Essential Question
Draw a logical conclusion as to what makes you the way that you are. How do genetics, variation, heredity, and other factors that you have studied in class explain your appearance and fitness?

7. Higher Order Questions
How does meiosis relate to natural selection?
Would you expect the other pairs of students in your class to have an offspring completely similar to yours? Explain your answer.
How might it be possible for you to show a trait when none of your relatives shows it?

8. Um…how do I cross those?!
Monohybrid cross

9. Reebop Baby Pair each paper with the same size
Write down genotype and phenotype of parents
Create punnet square
Get half of the genes from dad and half from Mom
Write genotype of baby
Write phenotype of baby
Create your reboot baby

10. Video: Procedure

11. CER
Write down a CER from the corresponding prompt in your handout.

12. Discussion Questions:
What does it mean when on organism is homozygous for a trait or heterozygous for a trait?
What are some similarities your Reebop® offspring shares with its parents? How is your offspring different from its parents?
Would you expect the other pairs of students in your class to have an offspring completely similar to yours?
Which traits in this investigation showed dominance?
Which traits in this investigation were recessive?
Which traits in this investigation showed codominance?
Do you think that anyone in your class has all the same genetic traits that you have? Explain your answer.
How might it be possible for you to show a trait when none of your relatives shows it?

13. Exit Ticket
1. If a man with blood type A and a woman with blood type B produce an offspring, what are the possible blood types that their child could have?
Based on this information, which describes the most probable genotype of the offspring? (SC.912.L.16.1)
A. AB or O C. A, B, AB, or O
B. A, B, or O D. AB only
2. Most sex-linked, recessive traits – including hemophilia and color blindness – appear in males more often than in females. This phenomenon is best explained by which statement? (SC.912.L.16.1)
A. Males have a dominant X chromosome with dominant genes.
B. Most of the genes on the X and Y chromosome of males are recessive.
C. In males, the recessive sex-linked genes appear only on the Y chromosome.
D. The Y chromosome is not homologous to the X chromosome, so it lacks the genes needed to mask the recessive gene on the X chromosome.
3. Eye color is genetically determined. Brown eyes are dominant to blue eyes. If a homozygous brown-eyed man marries a heterozygous brown-eyed woman, what is the probability that their first child will have brown eyes? (SC.912.L.16.1)
A. There is a 25% chance that their first child will have brown eyes.
B. There is a 50% chance that their first child will have brown eyes.
C. There is a 75% chance that their first child will have brown eyes.
D. There is a 100% chance that their first child will have brown eyes.
Blood Type
Combination of Alleles A B AB O ii