genes M and N are located on different chromosomes, and the probability of crossing over is quite low. If the probability of allele M segregating into a gamete is 1/6 and the probability of allele N is 1/4, what is the probability that both of them sill segregate into the same gamete? a. 1/12 b. 1/4 c. 5/12 d. 3/4 e. 1 answer is c. the book used the addition rule but to me this seems like you should have to multiply the two probabilities. thanks!