A. In my opinion, the basics are best. When I train clients, particularly women, I like to focus on basic compound exercises. These are exercises that use multi joint movements. To create muscle symmetry and overall lower body development, I always go with the squat, leg press and lunges, particularly the walking lunge (All my clients let out a collective sigh as they read this!)
In addition, to specifically target the glutes and hamstring, I recommend doing either Romanian Deadlifts or, if you have back issues, single leg deadlifts using a kettlebell. Some gyms have an awesome machine called the "Butt blaster" or Glute Machine. This is a great exercise as well. The exercise can be duplicated using a rubber exercise cable.
Depending on your goals, I usually recommend performing 2-3 sets of each exercise. Generally If you have a "flat butt", I would have a client do heavier weight for 6-10 reps to build the muscle up. To shape and tone the glutes, I like to use a weight that will allow for 10 to as high as 25 reps with good form. Feel free to contact me for a lower body fitness program.
*Consult your physician and a CERTIFIED personal trainer before beginning any fitness program to identify any restrictions or recommendations.