It really depends, think of it as 2 light bulbs in each parent. if both light bulbs in both parents are switched on that means their genes that they inherited are only able to have brown eyed babies, although if just 1 of the 4 light bulbs are not on it allows the baby to have blue eyes.
The regulatory system given to this particular question would be Homeostasis. homeostasis means that it creates a balance between things that are interdependent upon each other.
June 5th 1981 by the U.S centers for Disease Control and Prevention
The correct answer is...
D) Displacement
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