Chapter 6.1, Problem 2COMQ

In the experiment by Bateson and Punnett, which of the following observations suggested genetic linkage in the sweet pea?

a. A 9:3:3:1 ratio was observed in the ${\text{F}}_{\text{2}}$ offspring.

b. A 9:3:3:1 ratio was not observed in the ${\text{F}}_{\text{2}}$ offspring.

c. An unusually high number of ${\text{F}}_{\text{2}}$ offspring had phenotypes of the parental generation.

d. Both b and c suggested linkage.