Hai gen nằm trên hai NST khác nhau ( AA, Aa, aa) ( BB, Bb, bb)
=> 9 kiểu : AABB, AABb, AAbb, AaBB, AaBb, Aabb, aaBB, aaBb, aabb
Hai gen nằm cùng trên một NST
=> 10 kiểu: \(\dfrac{AB}{AB}\) ; \(\dfrac{AB}{Ab}\) ; \(\dfrac{Ab}{Ab}\) ; \(\dfrac{AB}{aB}\) ; \(\dfrac{Ab}{AB}\); \(\dfrac{AB}{ab}\) ; \(\dfrac{Ab}{ab}\) ; \(\dfrac{aB}{aB}\) ; \(\dfrac{aB}{ab}\); \(\dfrac{ab}{ab}\)