Problem:
A turkey breeder wished to increase the rate of growth in a stock by selecting for increased weight at six weeks after hatching. The mean weight of six-week old hatchlings is currently 4.2kg. Adult turkeys that had a mean weight of 5.1kg at six-weeks of age were used to produce a new generation of hatchlings. Among these, the mean weight was 4.9kg.
Required:
Question 1: Estimate the narrow-sense heritability of turkey weight at six weeks of age.
Question 2: Advise the breeder if his plan will work or not
Could someone explain this to me?