In the following cross, the genes are inherited independently except for A and B, which are tightly linked and show zero recombination: A/A. b/b; D/D; e/e; F/F X a/a B/B; d/d; E/E; f/f. Following selfing of the F_1 hybrid what proportion of the F_2 individuals will be phenotypically like either parent? Solution In a cross between AA.bb.DD.ee.FF and aa.BB.dd.EE.ff where A and B having 0 recombination but D, E and F are indipendently sorted. This implies 2 out of 5 i.e. 40% will be linkage and 60% cross over. After crossing 40% of the F2 individuals will be phenotypically like either parent..