Leslie_genetics key

# Leslie_genetics key - Section 103/112 Genetics Review...

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Section 103/112 Genetics Review WORKSHEET Mendel’s First Law: The members of a gene pair separate equally into the eggs and sperm Mendel’s Second Law: Different gene pairs assort independently in gamete formation Product Rule: The probability of independent events both occurring together is the product of their individual probabilities. Ex, roll two sixes in a row. P(roll one 6)=1/6 (1/6)(1/6)=1/36 Sum Rule: The probability of either of two mutually exclusive events occurring is the sum of their individual probabilities. I roll two sixes in a row, or two 4s in a row. (1/36)+(1/36)=2/36=1/18 Tay-Sachs is a severe autosomal recessive disease caused by the malfunction of the enzyme hexosaminidase A. The defect leads to a buildup of fatty deposits in nerve cells, causing paralysis followed by an early death. [Taken from page 74-75 of Griffiths] Calculate the probability Jim and Linda’s child will have Tay-Sachs disease.

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