Mixed

Strength training induces selective hypertrophy in the quadriceps femoris of older women, with varying degrees of growth across different muscle heads (VL, VM, VI, RF) along the length of the femur.

Expect uneven muscle growth in your quads; some parts (like the vastus lateralis and medialis) may grow more than others (like the rectus femoris). This is normal and does not indicate ineffective training.