Question

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.)
A. 25% tall, 50% intermediate, 25% short
B. 25% tall, 75% intermediate
C. 50% tall, 25% intermediate, 25% short
D. 100% intermediate

Answer 1

i dont no wat to tell u wish i could help

Answer 2

Okay so, Incomplete dominance is a type of inheritance in which one allele for a specific trait is not completely dominant over the other allele. This results in a combined phenotype (expressed physical trait).

For example, if you cross pollinate red and white snapdragon plants, the dominant allele that produces the red color is not completely dominant over the recessive allele that produces the white color. The resulting offspring are pink. (copied directly from: http://biology.about.com/b/2007/09/29/what-is-incomplete-dominance.htm )

So your punnet square would look like this (i'll leave you to fill it in - ask if you don't know how :) )

So given the co-dominance every occurrence of TT you will have a tall plant, Tt you will have a medium height plant and tt you will have a short plant - so which answer do you think it is? :)