Essential Genetics 6th Edition by Daniel Hartl

تمرين 12

The narrow-sense heritability of withers height in a population of quarterhorses is 35 percent. (Withers height is the height at the highest point of the back, between the shoulder blades.) The average withers height in the population is 19 hands. (A "hand" is a traditional measure equal to the breadth of the human hand, now taken to equal 4 inches.) From this population, studs and mares with an average withers height of 16 hands are selected and mated at random. What is the expected withers height of the progeny? How does the value of the narrow-sense heritability change if withers height is measured in meters rather than hands?