Which types of phenotypic ratios are likely to occur in crosses when dealing with a single gene pair 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)1:4:6:4:1,1:1:1:1
D)12:3:1,9:7
E)1:2:1,3:1

Question

Quizplus · Accepted Answer

The 1:2:1 and 3:1 ratios are typical for monohybrid crosses involving a single gene pair with complete dominance, where all genotypic combinations have equal viability. The 1:2:1 ratio represents the genotypic ratio for a monohybrid cross, while the 3:1 ratio represents the phenotypic ratio in such crosses.

Which Types of Phenotypic Ratios Are Likely to Occur in Crosses