I think the correct answer from the choices listed above is the first option. Nondisjunction occur during meiosis which affects inheritance. Nondisjunction<span> during </span>meiosis<span> produces eggs or sperm cells that don't have the normal number of chromosomes. Hope this answers the question.</span>
Calcitonin stimulates the kidneys to absorb calcium when calcium levels are too low, while parathyroid hormone stimulates the kidneys to excrete calcium when calcium levels are too high.
