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# ____________ Lab Exercise Lesson 8: Population Genetics Reading: Read through textbook (Principles of Genetics, Snustad &amp;amp; Simmons 2012):...

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Name: ____________ Lab Exercise Lesson 8: Population Genetics Reading: Read through textbook (Principles of Genetics, Snustad & Simmons 2012): Chapter 23 Videos: Solving Hardy-Weinberg Problems Hardy-Weinberg Lab Problems 1. There are 300 individuals in sample group #1 taken from population X. Seventy-Fve individuals of sample group are homozygous for the trait in question (I A I A ). Seventy Fve individuals are homozygous for the trait (I B I B ). Everyone else is heterozygous (I A I B ) for the trait. a. (10pts) What is the frequency of allele A in the sample group, assuming the trait is controlled by a single gene? b. (10pts) What is the frequency of allele B in the sample group, assuming the trait is controlled by a single gene? 2. (10pts) In a sample of 400 men, 48 have X-linked color blindness and all the others have normal color vision. If men are hemizygous for the allele, what is the frequency for the X-linked color blindness allele? 3. The frequency of sickle cell anemia, caused by a homozygous condition (Hb S Hb S ) is approximately 0.0016. The normal condition is also a homozygous condition (Hb A Hb A ). a. (10pts) Assuming the Hardy-Weinberg equilibrium applies, what is the frequency of the Hb S allele?
b. (10pts) Assuming the Hardy-Weinberg equilibrium applies, what is the frequency of the carrier state (Hb A Hb S )? 4. The A–B–O blood types are determined by three alleles I A , I B , and i . In one population the frequency of individuals who are homozygous for type A blood is 0.063, the frequency of individuals who are homozygous for type B blood is 0.015, and the frequency of individuals who are blood type O is 0.44. a. (10pts) What is the frequency of individuals are blood type AB? b. (10pts) What is the frequency of individuals who are heterozygous for type A blood? c. (10pts) What is the frequency of the i allele? 5. A population of size 50 reproduces in such a way that the population size remains constant. a. (10pts) If mating is random, how rapidly will genetic variability, as measured by the frequency of heterozygotes, be lost from this population? b. (10pts) If the population initially had a heterozygosity of 0.6, what is the predicted heterozygosity in 5 generations?

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Name: ____________
Lab Exercise Lesson 8: Population Genetics
Videos:
Solving Hardy-Weinberg Problems...

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