Q1. Mr. Simpson’s father and Mrs. Simpson’ brother each have the same rare, autosomal recessive disorder. Mr. and Mrs. Simpson are both unaffected. What is the prior probability that both Mr. and Mrs Simpson are carriers if the affected allele?

Q2. Tina is consuming 12 mg of iron per day. Her RDA is 15 mg. She has no condition warranting a greater-than-normal need for iron. Which of the statements is true about her consumption of this nutrient?