With blending inheritance, the height of the offspring is equal to the average height of the four grandparents. Find the probability that all four grandparents have height 40 cm and thus the probability that a plant in the second generation has height 40 cm.
Consider the above case of blending inheritance. A population of plants starts out with an equal number of individuals of heights 40 and 60 cm. The parents mate randomly, and the height of an offspring is exactly equal to the average height of its parents.