In peas, yellow seed color (y) is dominant to green seed color (y). a homozygous green pea plant is crossed with a heterozygous yellow pea plant. what is the predicted phenotypic ratio of the offspring?

a) 50 percent yellow, 50 percent green
b) 50 percent yy, 50 percent yy
c) 100 percent yellow, 0 percent green
d) 100 percent yy, 0 percent yy

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.