Unformatted text preview: in the same chemical pathway. Assume the capital letter allele is dominant in each case. a. 9:9:3:3:3:3:1:1 b. 27:9:9:3:9:3:3:1 c. 27:9:3:3:9:3:3:1 d. 81:27:9:9:27:9:9:3 e. 3:1 4. You perform the following cross of rats: Aa : Bb x Aa : bb What would the phenotypic ratios be in the offspring if locus A shows codominance and locus B shows dominance, both loci are independently assorting, and occupy different chemical pathways? a. 3:3:1:1 b. 9:3:3:1 c. 1:2:1:2:1:2:1 d. 1:1:2:2:1:1 e. 3:4:6:4:3 5. Which of the following genes of the lac operon could be considered a trans-acting element? a. I gene b. operator c. Promoter d. both a and b e. both b and c...
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- Fall '10
- phenotypic ratios, possible allelic combinations, independently assorted genes