When tumor cells from a patient with retinoblastoma are fused with normal cells, the fused cells have a normal phenotype. What does this suggest about whether the allele causing retinoblastoma is dominant or recessive? Explain.

A60-tooth gear is connected to a 72-tooth gear. if the smaller gear turns 12 times, how many turns does the larger gear make?

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.

Using meiosis, the sporophyte produces spores that are .