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# Review questions - Review questions Hardy-Weinburg Chapter...

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Review questions Hardy-Weinburg Chapter 24 content Chapter 25 content Blood flow through the heart Primary vs. Secondary immune response Cell mediated immunity Chapter 27 content and book questions

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Hardy-Weinberg The Hardy Weinberg principle Tests mathmatically, that allele and genotype frequencies remain the same in a diploid, sexually reproducing population Deviations to the Hardy Weinberg include Natural selection Genetic drift, Small population size Gene flow between populations Non random mating
p = number of dominant alleles q = number of recessive alleles q + p = 1 So if you know p you can figure out q and vis versa Hardy Weinberg equation p 2 + 2pq + q 2 = 1 p 2 = number of homozygous dominant individuals 2pq = number of heterozygous individuals q 2 = number of homozygous recessive individuals

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If the frequency of the dominant allele is .7 Then the freqency of the recessive allele is 1-.7 = .3 p =.7 q =.3 .7 + .3 = 1 Hardy Weinberg equation p 2 + 2pq + q 2 = 1 p 2 = .7 2 = .49 2pq = .7 x .3 = .42 q 2 = .3 2 = .09 So 49% of the population are homozygous dominant, 42% are heterozygotes and 9% are homozygous recessive If you do the same calculation using numbers for the next generation, the frequency of p and q should be the same If there is a change in p and q, then the population is not in Hardy- Weinburg equilibrium, and something is acting on the system to change allele frequencies
Chapter 24 4 classes of pathogens Innate immunity External barriers Internal defenses WBC, interferons, inflammation Lymphatic system Acquired immunity Active vs Passive Antigens, antibodies, antigen receptors, antigenic determinants Clonal selection Effector and memory cells Primary vs. Secondary infections Lymphocytes B-cells and T cells Humoral immunity Cell mediated immunity Book problems 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 15

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Chapter 25 Definitions Two types of regulation in animals – Endo vs. exothermic
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## This note was uploaded on 11/30/2010 for the course BIOS 101 taught by Professor Plantz during the Spring '08 term at UNL.

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Review questions - Review questions Hardy-Weinburg Chapter...

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