Dihybrid punnet squares are a lot like monohybrid punnet squares except that you have two genetic traits at once instead of having one trait. Also upper case letters stand for dominant traits and lower case letters stand for recessve traits. For example if B= black hair color and b=brown hair color and H=hanging earlobes and h=attatched earlobes than you can use a dihybrid punnet square to find out the probability of the various combinations.



external image ch10c4.gif