Hardy Weinberg Lab I. Purpose: The Hardy Weinberg principle states that the allele and gene frequencies will stay constant from generation to generation as long as no other evolutionary influences come along. The evolutionary influences can be things such as mutation‚ mate choice‚ selection‚ genetic drift‚ gene flow‚ and meiotic drive. Frequency is the proportion of individuals in a certain category relative to the total number of individuals considered. The frequency of an allele or genotype is
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Punnet square: dihibyrid cross- 2 parents w/2 different traits Ex: seed shape & seed color Cross pure-lines 2. F1 offspring are all heterozygous‚ Cross F1 x F1 F2 generation shows individuals of both phenotypes‚ in a specific ratio 9:3:3:1 -this would only occur if independent assortment = 2 alleles separate & sort independently into gametes Mendel Rules of inheritance Different alleles for the same gene Principle of segregation-each gamete has 1 allele of each gene Principle
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Internal Assessment | | A. SIMULATED BREEDING EXPERIMENTS WITH DROSOPHILA B. PROBABILITY AND MENDELIAN GENETICS IN PEA PLANTS | | Contents Part A Raw Data…………………………………………………………………………………………………………………...........................1 Processed Data……………………………………………………………………………………………………………………………………2 Conclusion…………………………………………………………………………………………………………………………………………..3 Part B Raw Data……………………………………………………………………………………………………………………………………………..4 Processed
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Introductory Biology‚ Biology 1407 MWF 11:00. TAMU-CC. Working version of the 1st lecture exam‚ as of 19 January 2014 1. Science can prove hypotheses to be false because: 2. In a population: phenotype Average number of offspring per individual Very small nose 5.5 Small nose 6.0 Medium size nose 10.7 Large nose 20.7 What is the relative fitness of organisms with small noses? 3. In the above population‚ assuming that at one time the population followed a normal curve
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LAB 2 Exercise 2.A. Gamete Formation 1. What are the gamete combinations that can be produced by the following individuals? a. AABB- AB b. AaBB- AB and aB c. AAABBcc- ABc d. AAbbCc- AbC and Abc e. AaBbCc- ABC‚ ABc‚ AbC‚ Abc‚ aBC‚ aBc‚ abC and abc 2. What are the possible genotypes of the offspring from mating of the following individuals? (the x refers to the mating. In the first‚ you would place EE along the top and ee on the side or vice versa). a. EE x ee E E e Ee Ee e Ee
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SIMULATION OF NATURAL SELECTION MATERIALS Plastic or paper bag containing 100 beads of two colours additional beads as needed. AIM To prove that both allele and genotype frequencies in a population would not remain constant if natural selection occurs. Natural selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring. INTRODUCTION Natural selection‚ the differential survival and reproduction of individuals was first proposed by
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Q: 1. Click all the combinations that produce horns. A: HH Hh Q: 2. Refer to your rules for Horns. Which allele (H or h) is the dominant allele? A: H Q: 3. Why do you think so? A: If I changed the allele to an H‚ the horns appeared. However‚ the h did not allow for the horns to show. Q: 2. Refer to your rules for Horns. Which allele (H or h) is the dominant allele? A: H Q: 3. Why do you think so? A: If I changed the allele to an H‚ the horns appeared. However‚ the h did not allow for the horns to
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Name __________________________ Date _____________ Period _______ Expected and Observed Results 1. Mendel made the following crosses with pea plants. For the pea plants round seeds (R) are dominant over wrinkled seeds (r). Complete the Punnett squares and answer the questions about each cross. a. b. c. d. 2. He crossed a round pea (R) plant with a wrinkled pea (r) plant. His results were 126 round peas and 122 wrinkled peas. Which of the Punnett squares
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OCA 3 The traits I chose to do my Punnett squares on are my blue eyes and my freckles. I got my blue eyes from my dad‚ and my many freckles from my mom. Both my parents have homozygous alleles for blue eyes. My dad has AA and my mom has aa. While my dad has homozygous for freckles and my mom had heterozygous. My dad has no freckles so he has aa‚ while my mom has tons of freckles so she has Aa. The capitol A’s represent the dominant traits and the lower case a’s represent the recessive traits. Since
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In rats‚ black color is dominant and white color is recessive. Cross heterozygous black rat with a white rat B=black b=white Bb x bb B b b P: 2/4 black‚ 2/4 white 1:1 b Bb bb Bb bb G: 2/4 Bb 2/4 bb 1:1 Can two white rats have a black offspring? Show the Punnett Square to confirm your answer B=black P: 4/4 white b=white 1:0 bb x bb 2 white rats G: 4/4 bb b b 1:0 b b bb bb bb bb NO‚ 2 white rats cannot have a black offspring. In humans the ability to taste a certain
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