1. Based on the parents’ genotypes, what is the genotypic ratio expected from a monohybrid cross between the two parents for the trait?

2. Based on the genotypic ratio from question 1, what is the expected probability of each genotype?

5. How close did your actual results come to your expected results? What caused the difference?

6. What fraction of actual BB, Bb, bb did you record? How close is it to the expected ration Mendel predicted?

7. Based on the parents’ genotypes, what is the phenotypic ratio expected from a dihybrid cross between the two parents for these traits?

8. Toss all 4 coins together 50 times and keep a tally sheet while doing so. How many tally’s for each genotype did you get?

9. Determine the actual probability in percent, that each genotype occurred.

10. How close did your actual results come to your expected results?

11. What fraction of actual phenotypes did you record, i.e. how many widows peak and smooth chin, no widows peak and cleft chin, etc? How close is it to the expected ration Mendel predicted?

3. 

Toss the coins together 50 times and keep a tally sheet while doing so. They can only turn up as BB, Bb, or bb.  Remember: each coin represents each parent and each toss can only turn up one way, therefore, a parent can give only one gene of a pair. How many tally’s for each genotype did you get?

1. BB – 13
2. Bb – 27
3. bb – 10 

4. 

Determine the actual probability in percent, that each genotype occurred.

1. BB – 26%
2. Bb – 54%
3. bb – 20%