A geneticist developed a new type of pest-resistant walnuts. These walnuts produce 75% of pest-resistant walnut trees and 25% of susceptible (not resistant) trees when two resistant trees are crossed. If a grower crosses two such trees, the outcome is random and a probability model is given by:
A)resistant and susceptible.
B)probabilities p = 0.70 and p = 0.3.
C)P(resistant)= 0.75 and P(susceptible)= 0.25.
D)P(resistant)= 0.7.

Question

Quizplus · Accepted Answer

Choice C correctly lists the probabilities of obtaining a resistant walnut tree (75%) and a susceptible walnut tree (25%) when two resistant trees are crossed. Choice A is incomplete and only provides the possible outcomes without the probabilities. Choice B incorrectly assigns the probabilities of 0.70 and 0.3 to the two outcomes without specifying which one corresponds to resistant and which one corresponds to susceptible. Choice D incorrectly assigns a probability of 0.7 to resistant without accounting for the possibility of obtaining a susceptible tree.

A Geneticist Developed a New Type of Pest-Resistant Walnuts