1. Genetic Crosses

2. Genotype vs Phenotype

3. Homozygous vs Heterozygous

4. Monohybrid Crosses
Monohybrid Cross: a cross that only one characteristic is tracked is monohybrid.
Punnett Square: a diagram used to aid biologists in predicting the probable distribution of inherited traits in offspring.
Six Examples: .

5. Example One: Homozygous X Homozygous

6. Example Two: Homozygous X Heterozygous

7. Example Three: Heterozygous X Heterozygous

8. Example Four: Testcross
How can you determine if a guinea pig is homozygous (BB) or heterozygous (Bb)?

9. Example Five: Incomplete Dominance

10. Example Six: Codominance

11. Dihybrid Cross
Dihybrid cross: is a cross which two characteristics (genes) are tracked.
The offspring of the animal being crossed in a dihybrid cross is called a dihybrid.
Two examples: .

12. Example One: homozygous X homozygous
Two seeds with two different genes being expressed:
(1) wrinkled, green (rryy)
(1) round, yellow seed (RRYY)

13. Example Two: Heterozygous X Heterozygous
Use the same procedure as in homozygous x homozygous.