17 May 2010 Monday

# 17 May 2010 Monday - Lecture notes genetics 17 May 2010...

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Lecture notes genetics 17 May 2010 Probability Definition: number of times a particular event is expected to occur divided by the number of trials or opportunities for it to occur Examples: o Probability of rolling a 4 on a die in one trial: 1/6 o Probability that a king of hearts will be drawn from a deck of 52 cards: 1/52 o Probability that a couple will have a son during any particular pregnancy: ½ Limits of probability o If an event is certain to occur: 1 o If an event can’t possibly occur: 0 o Range of possibilities: 0-1 Product rule: probability of 2 independent events occurring together = the product of their individual probabilities If a couple has 4 separate pregnancies, what is the probability that all four will result in the birth of a baby boy? o 1/16 A husband and wife are each carriers of the gene responsible for cystic fibrosis. What is the probability that this couple will have a child who has cystic fibrosis?

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