Cereal rusts became a problem when the first cereal crops were grown in the fertile cresent. However it took two Italian scientists‚ Fontana and Tozzeti to give us the first detailed description of stem rust fungus in 1767. Thirty years later in 1797 it was given the name Puccinia graminis. Puccinia fungal diseases are the most destructive disease of cereal production. They occur all over the world. Stem rust is a fungal disease caused by the pathogen Puccinia graminis and is a significant disease
Premium Agriculture United States Cotton
Several experiments have already been conducted for the past years that is related to our study particularly Electro Culture. Christofloreau (1925)‚ a French farmer‚ has attracted attention with his apparatus to collect atmospheric energy for his crops. A specific example of the plant that he used in his experiment is a clover‚ which he compared to a normal growth of clover. With the application of the electricity through Antenna system‚ the growth of clover has increased to 7 feet high. He also
Premium Agriculture Genetics Water
What is a gene? A gene is a continuous DNA segment that is transcribed into a single preRNA molecule. A zoologist and geneticist named Thomas Hunt Morgan is known for his research with fruit fly. Thomas Morgan was born on September 15‚1866 in Lexington‚ Kentucky. In 1886‚ he received his B.S. degree at the University of Kentucky. In 1910‚ Morgan saw that one male fly had a distinct difference about it. Instead of normal red eyes‚ this fly had white eyes (Allen). He wanted to test the breeding of
Premium Gene Genetics DNA
Hardy-Weinberg Principle Name: _______________________________ Period: ____ Show all work and box your answer for each of the following questions! 1. In a population at genetic equilibrium‚ the frequency of allele A is 0.5. a. What is the frequency of the homozygous dominant genotype (AA)? b. What is the frequency of the heterozygous genotype (Aa)? 2. If 16% of the individuals in a population at genetic equilibrium are recessive (aa). a
Premium Allele Zygosity Dominance
Lab 6. Drosophila cross( start) Melat Mebrahtu Lab Instructor: Professor Hicks Principles of Biology Lab II‚ Wednesday 1:00 am- 2:00 pm Abstract The goal of this experiment was to examine the Drophisila fly cross for which the result was seen in two weeks .The Drosophila melanogaster has been a model organism that was experimented in the laboratory. It is a small fruit fly that feeds on and lives on spoiled fruit. It is one of the most valuable organisms in genetics
Premium Allele Gregor Mendel Genetics
Extended Experimental Investigation | May 28 2013 | Drosophila melanogaster lab experiment Question: How do the dominant or recessive genes in particular traits in a cross between a male and female Drosophila determine the traits of its offspring? Aim: to establish whether characteristics produced from the offspring of a drosophila cross are recessive or dominant traits. Hypothesis: If certain phenotypes are expressed in the offspring from the cross of certain Drosophila‚ then the determination
Premium Allele Zygosity Dominance
A Summary of Alkaptonuria Alkaptonuria is an inborn error of metabolism that presents most notably with the occurrence of black urine when the urine is exposed to air. For this reason‚ it is also called the “Black Urine” disease. It is an autosomal recessive disorder and is therefore inherited genetically. Alkaptonuria is very rare‚ with a presentation of about 1:250‚000(ref1). The causality behind Alkaptonuria is a deficiency in homogentisic acid 1‚2 dioxygenase‚ an enzyme that is found in the
Premium Metabolism Gregor Mendel Amino acid
Drosophila melanogaster are a species more commonly known to us as fruit flies. They are extremely important in biological research due to the fact that they make excellent model organisms for understanding genetics. Reasons behind their frequent use include; easily cultured in the lab‚ short generation time‚ and they can produce many offspring. In this lab report‚ we began with three different strains of Drosophila. Introduction The common form of Drosophila is known as the “wild type”‚ any fly
Premium Gene Genetics DNA
Examination Timetables for 2013 Printed copies of your examination timetable‚ as displayed in myUnisa‚ will be accepted at Examination Venues together with identification documents. To print a copy: 1. Go to your "My Admin" site 2. Click on the link for "Examination Timetable" 3. Ensure that your mouse cursor has identified the correct part of the page (frame) 4. Click on the print function/icon of your Internet browser It is very important that you pay special attention to the dates and times
Premium Cell Allele Question
Question: If I cross a female apterous fly with a male wild fly‚ what would the offspring look like? Hypothesis: If I cross a female apterous fly with a male wild fly‚ then the offspring will be a 50% chance of a apterous fly or 50% chance of a wild fly. If I cross a female apterous fly with a male wild fly‚ then the offspring will be a 100% wild fly. Supporting Evidence for Hypothesis: Apterous flies have no wings‚ and are a recessive gene‚ while wild flies have wings and are a dominant gene
Premium Zygosity Allele Albinism