Cross the trihybrid AaBBCC times Aabbcc and give the probabi

Cross the trihybrid AaBBCC times Aabbcc and give the probability and ratio where AAA-American, BB-beauty CC-chutin aa-Negerian, bb-ugly, cc-thin.

Solution

we will use three punnet squares for all A\'s B\'s and C\'s which we have in AaBBCc x AabbCc. So one punnet square would be Aa/Aa, another would be BB/bb, and the last would be Cc/Cc.The the probability of aa,bb and cc is :

Aa/Aa = AA,Aa,Aa,aa = 1/4 of aa
BB/bb = BB,Bb,Bb,bb = 1/2 of bb
Cc/Cc = CC,Cc,Cc,cc = 1/4 of cc

total probability= 1/4*1/2*1/4=1/32

=>1/32 ,nigerian,ugly,thin

as aa=nigerian

bb-ugly

cc-thin