Evaluate a red-flowered plant was crossed with a white-flowered variation of the plant. all of the flowers on the next generation of plants were red. decide which flower color is recessive for this plant and which is dominant.

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.