Introduction Drosophila melanogaster is a common fruit fly that has been useful for most experiments in the study of Genetics. The male and the female fruit fly are similar and different in regards to how they look‚ structurally. They are similar because both genders have a head‚ thorax‚ proboscis‚ antennae‚ eyes‚ and mouth parts. However‚ males are smaller than females and have about five abdominal segments as opposed to the seven that the female has. The life cycle of these fruit flies consist
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the dominant and recessive phenotypes and their frequencies in the population? i. The dominant phenotypes do not always occur more commonly than recessive phenotypes do; that is‚ the dominancy of a phenotype in the population is independent of the dominance of the corresponding allele. In other words‚ the phenotype that has the higher allele frequency will be more abundant in the population. e. Newlyweds Bill and Sue are non-freckled. Since each had one parent who had freckles‚ they wonder what the
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PCB 3063 Spring 2012 Problem Set 1 ANSWERS 1. Determine the types of gametes produced by each of the following individuals: a. Aa 1/2 A‚ 1/2 a b. AaBb 1/4 AB‚ 1/4 Ab‚ 1/4 aB‚ 1/4 ab c. AABb 1/2 AB‚ 1/ Ab d. AaBBCc 1/4 ABC‚ 1/4 aBC‚ 1/4 ABc‚ 1/4 aBc 2. Use the Punnett square to determine the genotypes in the progeny of each of the following crosses: a. Dd x Dd b. AaBB x AaBB c. CcEE x CCEe Notice: in every case‚ each parent produces
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INTRODUCTION TO DROSOPHILA GENETICS DROSOPHILA CULTURE We will study basic principles of Mendelian inheritance with the use of the fruit fly‚ Drosophila melanogaster [the name means “black-bodied fruit-lover”]. Drosophila was one of the first organisms to be studied genetically: its small size‚ short life cycle (10 ~14 days at 25oC)‚ high reproductive rate (an adult female can lay 400-500 eggs in 10 days)‚ and ease of culture and genetic manipulation have made it perhaps the best understood animal
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Case Study – A Sickeningly Sweet Baby Boy Part I Questions 1. What additional information would you want to know to understand Emma and Jacob’s panic? To understand the cause of the panic that was brought to Jacob and Emma‚ you would need to know more about the state of the baby. This article just describes that the boy was having difficulty feeding‚ and after seven days he stopped feeding. This isn’t a situation that brings upon panic right away‚ but for Emma and Jacob it did. The panic
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In my lab experimentation‚ all of the parent generation‚ or flies I started with‚ were wild-type or mutant phenotypically‚ but their genotypes were unknown. However‚ after I mated these flies and they produced offspring‚ the parental genotypes could be hypothesized based on phenotypic observations and ratios of the F1 and F2 generations. I then could check my observations by testing it using the Chi squared (X2) test. A. Miniature Wings – (Sex-Linked Recessive) To determine the inheritance of
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observable characters that vary in pea plants are controlled by single genes. 2. A plant with purple flowers is allowed to self-pollinate. Generation after generation‚ it produces purple flowers. This is an example of a. hybridization. b. incomplete dominance. c. true-breeding. d. the law of segregation. e. polygenetics. 3. Which of the following statements about Mendel’s breeding experiments is correct? a. None of the parental (P) plants were true-breeding. b. All of the F2 progeny showed a phenotype
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MGIS 467 AIRBNB The hotel industry is a saturated industry that normally requires firms to maintain substantial overhead‚ substantial capital property‚ and brand reputation to successfully compete for fluctuating market shares. As a result‚ rivalry is high and there is little room for new entrants in the fiercely competitive and economically sensitive hotel industry. That being said‚ Airbnb has created a market that enables almost anyone who owns sleeping space to become a competitor to hotels
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Chapter 12 (Part 2) Explain the principle of independent assortment and its relation to meiosis: The segregation of chromosomes in anaphase I of meiosis explains Mendel’s observation that each parent gives one allele for each trait at random to each offspring‚ regardless of whether the allele is expressed. The segregation of chromosomes at random during anaphase I explains Mendel’s observation that factors‚ or genes‚ for different traits are inherited independently of each other. Apply the
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incomplete dominance. E) hemizygosity. 5) Assume that a cross is made between AaBb and aabb plants and that the offspring occur in the following numbers: 106 AaBb‚ 48 Aabb‚ 52 aaBb‚ 94 aabb. These results are consistent with the following circumstance: A) sex-linked inheritance with 30% crossing over. B) linkage with 50% crossing over. C) linkage with approximately 33 map units between the two gene loci. D) independent assortment. E) 100% recombination. 6) With incomplete dominance‚ a likely
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