GENETICS...Epistasis?

1. Snapdragon flowers come in three colors: red, pink, and white. Which of the following statements about this plants flower color is NOT true?


a. Snapdragon flower color is an example of incomplete dominance.


b. Snapdragon flower color is an example of epistasis.


c. Red flowers are dominant over white.


d. Pink flowers must be heterozygous.





2. In Mendel's experiments, the characters for height were incompletely dominant, such that TT are tall, Tt are intermediate and tt are short. What would be the phenotypes resulting from crossing a true breeding short plant to a true breeding tall plant?


a. ¾ tall, ¼ short


b. ¼ tall, ½ intermediate, ¼ short


c. all intermediate


d. can not be determined





3. Blood from people with AB blood type shows characteristics of both type A and type B blood. Their blood phenotype is not an intermediate between type A and type B. This is an example of:


a. Incomplete dominance


b. Codominance


c. Pleiotropy


d. Non-genetic influences

GENETICS...Epistasis?
1) c, no trait is 'dominant' when you have incomplete dominance or epistasis





2) c





3) b -- shows both traits