1. By Marwa, Michelle A, Amna
PUNNETT SQUARES
By Marwa, Michelle A, Amna

2. Monohybrid vs. Dihybrid cross
Monohybrid: A cross between two individuals with two versions of one trait.
Example: SS x ss (spherical vs. wrinkled seed)
Dihybrid: A cross between two individuals with varying versions of two or more traits
Example: SsYy x ssyy
(spherical vs. wrinkled & yellow vs. green)

3. Mendel’s Monohybrid Cross
Parental (P) generation: SS x ss
S S s
F1 generation: S
s S s S
F2 generation: s
Mendel’s Monohybrid Cross

4. Blood type

5. http://www.dnacenter.com/science-technology/dna-history-1920.html O ii
NONE
A + B
O, A, AB, B

6. JUDGE JUDY
Case of paternity fraud:
YOU’RE THE JUDGE!

7. Paternity case Kim’s parents blood type: AA x OO A A O
What is Kim’s phenotype? ______
What is her genotype? _______
Kim’s child’s phenotype: O
Paternity case

8. Paternity case
Kim x Kanye
AO x B_
A O A O

9. 25 % Kanye’s phenotype is BO If the child has blood type O, what
percent chance is the child Kanye’s?
25 %