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.

Question

Quizplus · Accepted Answer

When two pest-resistant walnut trees are crossed, we get 75% pest-resistant trees and 25% susceptible trees. This means that over many crossings, approximately 75% of the trees will be pest-resistant, while 25% will be susceptible. Therefore, choice C, approximately 70% of resistant trees over many crossings, is the best option. The other choices are incorrect because they do not accurately reflect the expected outcome based on the given information.

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