Which types of phenotypic ratios are likely to occur in testcrosses when dealing with two gene pairs for which all the genotypic combinations are of equal viability?
A) 9:3:3:1, 27:9:9:9:3:3:3:1
B) 2:3, 1:2
C) 1:1:1:1
D) 12:3:1, 9:7
E) 1:2:1, 3:1
Ans: C) 1:1:1:1
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