bio q

[happyasaclam88]

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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!

 

[Hugh Mannity]

Addition rule would be what is the prob. of one OR the other. You are right that both would be multiplied.