Genetics With Drosophila Flies Josh Derrall Lab Group: Dana Gilkes James Lupo Olivia Giannola December 4‚ 2012 Prof. Hunter Introduction Genetics is a topic that has been studied for hundreds of years. One of the most notable geneticists was Gregor Mendel. Mendel studied basic inheritance patterns and gene expression using pea plants. Mendel determined that the offspring of two parents contains one gene from each parent (McKusick 1983). However‚ since Mendels discoveries
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Evolution Lab A. 1. a. The default value of 20 cm of rainfall is relatively low compared the range that the island may receive‚ which is anywhere between 0 cm to 100 cm. b. From an average of 20 cm of rainfall I would expect more hard seeds to be produced. 2. a. The beak size of 12 mm is relatively shallow compared to the available range from 10 mm to 30 mm. b. The shallow beak size of 12 mm is not suited for the hard seeds that are available because of the low rainfall of 20 cm.
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Starch is a type of Carbohydrate that’s made from thousands of glucose units. Simple sugars are the basic units that make up starch. Carbohydrates provide us with energy so that we can carry out our daily routines. Our body then digests it into glucose so we can have energy to do that. Saliva is a form of chemical digestion that is in the mouth. Amylase is an enzyme that catalysts the breakdown of starch into sugars. Amylase is present in human saliva‚ where it begins the chemical process of digestion
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displacement‚ the volumes of the paper clip samples were measured and the masses were obtained by using an electronic balance. Each mass and volume was unique to their sample so by using their values‚ density was used to identify substances in the lab. After conducting the experiment‚ the results showed that there was a positive slope between the different paper clip samples’ masses and their volumes. It was concluded from this pattern that density is an extensive property. Introduction In science
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1P Paper Towel Absorbency Experiment Write-Up Purpose: The purpose of this experiment is to conduct a valid experiment‚ realize that the way I conduct an experiment influences the data‚ and I want to know which paper towel has the higher absorbency times. My hypothesis is that bounty will be the quicker picker upper Materials and Methods: As a class we chose that our control out of the brands provided (Bounty‚ Viva‚ Wal-Mart‚ and the School brand) would be the Schools brand of paper towel
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and widespread in the environment. In this lab‚ we undertook to determine the differences in the agars being used and the different colony count observed. After taking four different samples of microbes from the environment and swabbed them in two different plates one with nutrient agar and the other with sabouaud dextrose agar. After the microbes had incubated for 48 hours no results were discovered from the swabs we had taken from the environment. This lab further investigates the different swabs
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Heeneman Bio 152-100 February 27‚ 2013 Fruit Fly Lab Data from my group: Vestigial winged offspring: 0 Wild Type winged offspring: 10 Data from class: Vestigial winged offspring: 42 Wild Type winged offspring: 237 Data from all classes: Vestigial winged offspring: 345 Wild Type winged offspring: 1‚297 The hypothesis of the fruit fly mating experiment was that when placing homozygous recessive virgin female fruit flies in a mating tube with two homozygous
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Introduction Enzymes are proteins that are involved in all the chemical processes in living things. As they are made of proteins they are affected by pH and temperature. Enzymes are catalysts; they speed up chemical reactions without being changed themselves. Digestive enzymes speed up the breakdown of large food molecules into smaller ones so that the blood can absorb them. Enzymes turn a large starch molecule into thousands of tiny glucose molecules. Enzymes end in ’ase’. There are thousands of
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What Can Fruit Flies Reveal about Inheritance? Lab Notebook Chi-Square test for Case 1 Phenotype Observed No. (o) Expected No. (e) (o-e) (o-e) 2 (o-e) 2 e Red eyes 31 33 2 4 0.1212 Sepia eyes 13 11 2 4 0.3636 2 (to the nearest ten-thousandth) 0.4848 Questions 1. Why is it important to remove the adults in the parental generation? To keep the tests accurate‚ it is important to separate the adults from the parental generation so you know you are only crossing the F-1 flies. 2
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Process of Science What Can Fruit Flies Reveal about Inheritance? Lab Notebook Chi-Square test for Case 1 Phenotype Observed No. (o) Expected No. (e) (o-e) (o-e) 2 (o-e) 2 e Red eyes 3 Sepia eyes 1 2 (to the nearest ten-thousandth) Questions 1. Why is it important to remove the adults in the parental generation? It is important to keep the generations separate so that you know you are crossing only F1 flies. 2. What generation will their offspring be? The new offspring
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