1. Two organisms with genotypes of two traits of Ttbb and ttBB are crossed. Assuming Mendel's second principle, what is the probability of obtaining an organism with genotype T-B-?
A. 9/16
B. 1/2
C. 1/16
D. 0
E. 1
2. After screening a population of 3000 people for a given dominant genetic defect, I discovered 65 has the defect and 5 of these had one affected parent. What is the mutation frequency for this gene in this population?
A. 60/3000
B. 65/4000
C. 5/6000
D. 60/6000
E. None of the answers are correct.