Ch14_InheritanceandProbability

Ch14_InheritanceandProbability - (anevent )toone(anevent

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Mendel’s laws of segregation and independent  assortment reflect the same laws of probability that  apply to tossing coins or rolling dice. The probability scale ranged from  zero (an event  with no chance of occurring)  to  one (an event  that is certain to occur).
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The probability of tossing heads with a normal coin is 1/2.
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The probability of rolling a 3 with a six- sided die is 1/6,  and the probability of rolling any other  number is 1 - 1/6 = 5/6.
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When tossing a coin, the outcome of one toss has no impact  on the outcome of the next toss. Each toss is an  independent  event, just like the distribution of  alleles into gametes. Like a coin toss, each ovum from a heterozygous parent  has a 1/2 chance of carrying  the dominant allele and a  1/2 chance of carrying the  recessive allele. The same odds apply to  the sperm.
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When to use it: When you want to determine the probability that  two 
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