Biology Lab 4.docx - Laboratory Report 5 Genetics I Name...

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Laboratory Report 5: Genetics I Name Alexis Alt 1. Tobacco plants a) What is the expected ratio of white to green F2 tobacco plants? Back up your answer with a punnett square Green: Albino 3:1 A a A AA Aa Aa aa a b) If a heterozygous F1 Tobacco plants were crossed to an albino plant, what is the expected number of green and white plants in the next generation? (show punnett square and give the expected ratio) Green: Albino 2:2 A a a Aa aa Aa aa a 2. PTC a) Class Data: Tasters Non-tasters n=18 13 5
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b) Using Chi-square test determine if class data fits the hypothesis test to see if the U.S. national average of 70% tasters is upheld in our class (show all work and make sure you back up your answer with a chi-square test) e / e) - (o x 2 2 .7(18) = 12.6= e for tasters .3(18) = 5.4= e for nontasters (13-12.6)^2/12.6+ (5-5.4)^2/5.4= .04 = chi-square df = 2-1 = 1 p = between .70 and .90 Since our p value is above .05, our class is not significantly different in tasters and nontasters compared to the U.S. population.
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