Problem with genetics the Sims 2 Legacy

Could the creators fix the genetics in The Sims 2 Legacy? It's about the inheritance of recessive genes (blond hair etc.) in sims created in family creation mode that have no ancestors. When we combine two sims created by the player where one has blond hair and blue eyes and the other has black hair and brown eyes, only children with black hair and brown eyes are born. This is quite frustrating because the fix mod no longer works with this version of the game and the sims 2 genetics are great!