Q1. Explain why an organism with a homozygous dominant genotype has the same phenotype as an organism with a heterozygous genotype.

Q2. Explain the physiological connections between calcium blood levels and the actions of calcitriol, calcitonin, and parathyroid hormone. What are the dangers if one of these is not working properly? Now consider large number of postmenopausal women taking Fosamax or Actonel which acts by destroying osteoclasts.