A Geneticist Developed a New Type of Pest-Resistant Walnut Tree

Multiple Choice

A geneticist developed a new type of pest-resistant walnut tree. These walnut trees produce 75% of pest-resistant walnut trees and 25% of susceptible (not resistant) trees when two resistant trees are crossed. If two such trees are crossed, we will get:

A) a resistant tree every third crossing.
B) a resistant tree for the first 70% of crossings and then susceptible trees.
C) approximately 70% of resistant trees over many crossings.
D) exactly 30% of susceptible trees over many crossings.