Evolution | | 1. Which of the following would be considered homologous structures? Question options: |[pic] |tentacles of an anemone and tentacles of a squid | |[pic] |wings of a bird and arms of a human | |[pic] |wings of a butterfly and wings of a bird | |[pic] |lungs of a mammal and trachea of an insect | 2. According to modern evolutionary theory‚ vertebrate embryos (i.e. frog
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The study of fossils is helpful to know in understanding evolution‚ as it teaches us about our past‚ including common ancestors. Evolutionary biology deals with the study of changes in organisms in a population. ( 6 ) This will help with the analysis in similar (vestigial) structures in organisms‚ homologous structures‚ and population genetics. Developmental biology mainly studies an embryo‚ once fertilized‚ through growth. The comparison between embryos is most helpful in this situation due to the fact there are many similarities between embryos as they
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To perform this study and observe the behaviors and reactions of Drosophila melanogaster and how they respond to different stimuli and repellents‚ the research members decided to use mutant fruit flies‚ for this reason they lacked wings‚ making their manipulation simpler. In order to carry out this study it was necessary to first obtain an adequate number of flies to observe them throughout the weeks. The research members had the flies accompanied with larvae in stock vials‚ and later transferred
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KLUGMC03_038-060HR 10/18/06 1:01 PM Page 38 C H A P T E R 3 Mendelian Genetics Gregor Johann Mendel‚ who in 1866 put forward the major postulates of transmission genetics as a result of experiments with the garden pea. CHAPTER CONCEPTS ■ Inheritance is governed by information ■ During gamete formation‚ chromosomes stored in discrete factors called genes. ■ Genes are transmitted from generation to generation on vehicles called chromosomes. ■ Chromosomes‚ which exist
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Your Inner Fish Your Inner Fish by Neil Shubin‚ delves into the questions of why the human body looks the way it does. Looking at the earliest forms of vertebrate life on land and even to the earliest forms of life on Earth we can trace the evolution of the human body. The creatures‚ from millions of years ago‚ have left us with a genetic a imprint that reveals how similar we truly are to the other creatures on Earth. Shubin tells the story of evolution by tracing the skeletal features and organs
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There were observable differences between the mutant and wild-type Drosophila melanogaster. The mutant pupae were lighter in comparison to the wild-type pupae‚ while the larvae were the same color. After eclosion‚ the mutant expressed a slightly darker pigment than the wild-type. Hours later‚ the expressivity of the mutation increased‚ and the female and male mutants had a noticeably darker pigment than the wild-type on the legs‚ wings‚ head‚ and overall body. Because of the darker pigment‚ the mutant
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The purpose of this experiment was to determine if two selected traits of Drosophila melanogaster‚ dumpy wings and sepia eyes‚ follow Mendel’s Laws of Inheritance through the F2 generation. Materials and Methods In week one‚ two crosses were set up. Dumpy females were crossed with sepia males‚ while dumpy males were crossed with sepia females. The dumpy phenotype consisted of shorter‚ smaller wings while the sepia phenotype consisted of brown eye color. For these crosses‚ all females were virgins
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BIOL 323-02 TTH 12pm-2pm Drosophila melanogaster: Monohybrid Cross & Sex-Linked Inheritance October 6‚ 2012 Abstract This lab involved a monohybrid reciprocal cross and a sex-linked cross utilizing Drosophila melanogaster fruit flies. After sexing the flies‚ placing them in media‚ and letting them cross breed‚ we analyzed and recorded the phenotypes that were observed. The P1 flies were anesthetized then sexed by observing their phenotypes and equally distributed
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pulmonary diseases. Introduction Many animals have developed mechanisms that allow them to sustain anoxia comas for extended periods of time with little to no physiological consequences. This experiment is designed to test the amount of time it takes Drosophila melanogaster to enter and recover from an anoxia coma at different water bath temperatures. The purpose is to deduce the effects temperature has on the organism’s ability to enter and survive the anoxia coma‚ and generalize what body changes allow
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Biology‚ 7e (Campbell) Chapter 24: The Origin of Species Chapter Questions 1) Which of the following applies to both anagenesis and cladogenesis? A) branching B) increased diversity C) speciation D) more species E) adaptive radiation Answer: C Topic: Concept 24.1 Skill: Comprehension 2) Which of the following statements about species‚ as defined by the biological species concept‚ is (are) correct? I. Biological species are defined by reproductive isolation. II. Biological
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