Question

50 points if you answer right
In a monohybrid cross, if the gene for tall (T) plants was incompletely dominant over the gene for short (t) plants, what would be the predicted result of crossing two intermediate (Tt) parent plants? (Hint: You may want to complete a Punnett square.) 25 percent tall, 50 percent intermediate, 25 percent short 50 percent tall, 25 percent intermediate, 25 percent short 100 percent intermediate 25 percent tall, 75 percent intermediate

Answer 1

In a monohybrid cross, if gene for tall (T) plants was incompletely dominant over the gene for short (t) plants, it will give plants with intermediate tall (Tt) in first filial (F1) generation. When the F1 offspring consisting of all intermediate tall are allowed to cross, the resulting (F2) offspring consist of all three phenotypes [25% tall (TT): 50% intermediate tall (Tt): 25% short (tt)]. The phenotypic ratio is 1:2:1.