Exercise 7.7 Repeat the analysis of Example VII.6 for the intercrosses AB/ab × AB/ab (coupling). In this case (see Rao (1973)), the probabilities are

(a) for AB: (3 − 2π + π2 )/4,

(b) for Ab: (2π − π2 )/4,

(c) for aB: (2π − π2 )/4 and

(d) for ab: (1 − 2π + π2 )/4, where π is the recombination fraction. Derive the posterior distributions making use of the DA principle.