Osteoarthritis is usually caused by
A) genetic factors.
B) repetitive motion.
C) effects of injury.
D) All of the answers are correct.
Question 2
All of the following factors put women at higher risk than men for osteoporosis EXCEPT
A) testosterone in males helps maintain bone mass in men as they age.
B) women live an average of five years longer than men, and bone loss increases with age.
C) falling estrogen levels after menopause accelerate bone loss.
D) many women strive to stay thin and keep their body weight low in their youth, which can result in lower bone density.
Some organisms used as models in genetic research
The molecular basis of genetic complementation
genetic code From Gene to Protein
effects
Effects of alterations in Shh morphogen activity in the floor plate and the limb bud
A genetic bottleneck