Which Types of Phenotypic Ratios Are Likely to Occur in Testcrosses

question 35

Multiple Choice

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) 1:2:1, 3:1
• C) 1:1:1:1
• D) 12:3:1, 9:7
• E) 2:3, 1:2

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