D type flip flop feedback
Yes this can be easily by considering the following picture  







simulate this circuit &ndash; Schematic created using CircuitLab

 Here in the above diagram,this D flipflop works when rising edge of clock is detected.On power ON the D will be in OFF and hence Q also OFF.As told early,the flipflop activates when +ve edge is detected.When rising edge is detected,the flipflop gets actives and inverted Q(LOW) and Q(HIGH) at this instant.This inverted Q is fed back to the D at the same instantThe output of the flipflop never change until positive edge is detected.The next raising clock will happens at the next cycle of the clock signal.Unless,the output never changesNow the next rising edge is detected,The inverted Q goes HIGH and Q goes to LOW.This inverted Q is fed to D again and wait until the rising edgeThis cycle continuous.From the diagram,you can observe that,for a complete cycle of CLK,one half of clock is get at the output of D flipflop.Thus,the input CLK is divided into 2 when it appears at the output of the  Q.The circuit in the diagram is not similar with your circuit.I just mad a JK flipflop ad D flipflop.Consider the clock and understand based on explanation.