mutation #644. It is a mutation in wing morphology that reduces wing size. A controlled cross was conducted between these two true-breeding mutant flies. Their progeny (F1) being heterozygous for both mutations displayed only wild type phenotypes. These two mutations in Drosophila are both believed to follow an autosomal recessive pattern of inheritance. Figure 1. Images Drosophila melanogaster with mutations. From left to right‚ mutation in eye color (e)‚ mutation in wing morphology (w). A controlled
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molting. D. melanogaster will go through 3 instars before reaching the pupa stage. (Flagg‚ 1979) The pupa stage will last for about 6 days after which the adult will eclose. During the pupa stage the pupa will darken and the eyes as well as the wings will appear visible through the casing. Gregor Mendel created 3 principles as it relates to the laws of genetics. The 3 principles of Mendel’s laws of genetics are the law of dominance‚ the law of segregation and the law of independent assortment
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sexual selection‚ and that sexual selection would be in favor of the wild-type drosophila. For the cage containing the predator‚ we hypothesized that the vestigial flies would have a higher relative fitness due to natural selection. A ratio of wild-type to vestigial flies was determined‚ and was set up in each environment. 10 wild-type to 40 vestigial flies was chosen‚ giving a total of 50 flies for each environment. Each week the flies were fed‚ and every two weeks they were counted to represent a new
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Level * 2 3 0 8 9 6 9 9 7 3 * BIOLOGY Paper 5 Planning‚ Analysis and Evaluation Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black ink. You may use a pencil for any diagrams‚ graphs or rough working. Do not use staples‚ paper clips‚ highlighters
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1. Did the construction of the phylogenetic tree based on the 14 living Caminalcules change the way you would group Caminalcules species in your taxonomic classification (chart)? What does this suggest about classification based on strictly of similarity versus evolutionary relationship? The phylogenetic tree was more of an evolutionary tree. It showed the evolution of the organisms and their ancestors or traits that they branched off of. The chart however just simply organizes and separates the
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The purpose of this experiment was to determine the F1 genotype of fruit fly traits using the phenotypic ratio of the F2 generation and to express these results of the unknown cross through a Chi-square model and Mendelian genetics. After the experiment‚ it was found that the parents held a heterozygous genotype through using the Chi-square model‚ and that the observed and expected values fall within the Chi-squared value which also falls into the p-value. The Chi-squared value was 5.64‚ the degrees
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In Drosophila‚ 3 autosomal genes have alleles as follows Gray body color (G) is dominant over black (g) Full wings (A) is dominant over vestigial (a) Red eye (R) is dominant over sepia (r) Two crosses were performed with the following results: Cross I: Parents: heterozygous red‚ full X sepia‚ vestigial Offspring: 131 red‚ full 120 sepia‚ vestigial 122 red‚ vestigial 127 sepia‚ full
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Brad Trent Biology 301L 22 April 2014 Drosophila melanogaster Lab Report Drosophila melanogaster Population Genetics Introduction Population genetics is a very important topic that has to deal with the structure of populations and how different factors and phenomena cause change in the populations genetic
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1.3 Transitional fossils A transitional fossil is any fossilised remains of a life form that has traits common to both a presumed ancestral group and its presumed derived descendant group. Transitional fossils are used as evidence to support evolutionary theory as they are suggested to demonstrate the gradual transition from one species to another through a multitude of changes. In essence‚ the transitional fossils are the remains of the species that have gone extinct‚ and these species are represented
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Name ______________________________________ Virtual Lab Report: Part I Due by: 11:59 PM PST on the second Saturday of class Virtual Lab 1: Virtual Microscopy A. Estimate the size (length and width) of these microscopic objects in micrometers (microns): 1. An E. Coli cell. 3 x 0.6 um =1.8 um 2 A mitochondrion. 4 x 0.8 um = 3.2 um 3. A Red blood cell. 8 um 4. A virus. _Hepatitis 45 nm = .045 um 5. A water molecule. 275 pm =.275 um B. 1 Describe three differences between prokaryotic and eukaryotic
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