MCDB Christoffersen Lecture#2

MCDB Christoffersen Lecture#2 - happen the general rule is...

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MCDB Christoffersen Lecture #2 Meiosis Role in Genetics Meiosis accounts for the segregation of alleles Testcross o Cross F 1 hybrid with true-breeding recessive parent o Offspring will show 1:1 phenotypic ratio o Can be used to test for heterozygosity in individuals with dominant phenotype and unknown parents. Probability and Predicting Genetic Outcomes The basic conventions of probability: o If an event is certain to happen, its probability is 1 o If the event can’t happen the probability is 0 o Otherwise the probability is between 0 and 1 Important Rule: The sum of all alternate outcomes must equal 1 Product Rule o To determine the probability that two independent events will both
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Unformatted text preview: happen, the general rule is to multiply the probabilities of the individual events • Sum Rule o The probability of an event that can occur in two or more different ways is the sum of the individual probabilities of those ways. Mendel’s Dihybrid Crosses and Independent Assortment • Two different traits in the same cross • Example: seed color and seed shape • Question: Is the segregation pattern of one gene influenced by the segregation of another gene? • Mendel’s 2 nd Principle: Law of Independent Assortment o The law of independent assortment, states that alleles of different genes assort into gametes independently of each other. •...
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MCDB Christoffersen Lecture#2 - happen the general rule is...

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