Troy is a known CF carrier and his partner Saffi is pregnant. Saffi tests negative on a DNA test that detects 75% of CF mutations. What is the probability that they will have an UNAFFECTED child? The answer requires the use of Bayes analysis, which is briefly outlined below (page 32) and will be revised during the lab class. (NB this question is not related to the Jones or Smith family). Fill in the table with each probability then provide your final numerical answer below the Table. Give your final answers in decimals, not fractions (calculating your answers using fractions is fine).

	Scenario A Saffi is a carrier	Scenario B Saffi is not a carrier
Prior Probability
Cond. Probability
Joint probability
Posterior probability