In a trihybrid cross, an individual with the genotype AaBbCc is crossed with another individual with the genotype aaBbCc. The F1 generation can have eight different genotypes: AaBbCc, AaBbcc, AaBbcc, AabbCc, aaBbCc, aaBbcc, aaBbcc, and aabbCc. What is the probability of each genotype P(AaBbCc) occurring?

• A. 1/2
• B. 1/4
• C. 1/3
• D. 1/8

Answer: (D)