Classical genetics

mutant phenotype is autosomal recessive. The error could have been from the fact that we did not have a sufficient number of flies to analyze and therefore gave us an inaccurate ratio of wild type to mutant phenotypes. Introduction When analyzing genetic crosses between organisms we must first come to a complete understanding of two of Mendel’s Laws. Mendel’s first law which is also known as the principle of segregation states that “alleles segregate in the formation of gametes.” (Branco and Pires

Kayla Berezne Mrs. Cohen Honors Biology 24 March 2013 Genetic Predictions in the Fruit Fly The Drosophila melanogaster is a fruit fly with a very short life cycle. They can be winged or wingless, and have red eyes or white eyes. The different options are called alleles. Alleles are the variants of a specific gene, and one is received from each parent on each chromosome. (“What Are Dominant and Recessive?”). It was chosen to use winged females and wingless males to predict the offspring in this

Name: Date: 03.05.13 Student Exploration: Hardy-Weinberg Equilibrium Vocabulary: allele, genotype, Hardy-Weinberg equation, Hardy-Weinberg principle, heterozygous, homozygous, Punnett square Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Suppose the feather color of a bird is controlled by two alleles, D and d. The D allele results in dark feathers, while the d allele results in lighter feathers. 1. Suppose two Dd birds mate. What percentages of DD, Dd, and dd

Genetic Mutation in C. elegans and its Affect INTRODUCTION Caenorhabditis elegans (C. elegans) are transparent roundworm, that range about 1mm in length and lack a respiratory and circulatory system. C. elegans is a model organism in genetics, its short life cycle, ease of cultivation, small size, and high cell number and development makes it an easy animal to use in experiments (International Journal of Molecular Science). In this experiment, two strains of worms will be used. Virgin hermaphrodite

Survey at least 20 people to find out what traits they have for each of the features below. Tally the numbers for each trait and record those totals in each column. When completing the survey, be sure to include yourself as one of the individuals surveyed. Also include at least one set of parents and offspring in the individuals you survey. Document the features of each member of the family you surveyed within the data table, but also make a special note of these features in the observation section

INVESTIGATION OF THE INHERITANCE OF THE ROSETTE GENE IN BRASSICA RAPA By: Justine Poorbaugh Foundations of Biology 2 Laboratory Thursday 2:30 PM Professor Cheek April 21, 2011 ABSTRACT The Brassica rapa is a rapid growing plant that has a standard form and a mutant rosette form. Relative to normal plants, the rosette form is shorter and takes longer to flower. The mode of inheritance of the rosette gene was tested by crossing two true-breeding plants, one of each form. The F1 generation

The purpose of our experiment was to see the progeny from the cross between the wild-type females and the mutant males and the cross between mutant females and wild-type males. We started by preparing the vials for the test cross. We had first prepare that inside the vials that will provide nutrients to the fruit flies so that they can carry out their life cycle. To do this, we obtained a clean vial and a foam plug. Next, a small scoop of powdered food was added to the vial. Then a small scoop of

Introduction When asked about mutations, common answers could be “it could be genetic” or “something probably went wrong during the gestational period” but do people really know the underlying truth about mutations? For example, not much is known about the white eyed phenotype in Drosophila melanogaster. Understanding how the white eyed phenotype is inherited in these flies could allow other scientists/researchers to be closer in solving genetical problems in humans. This study attempts to understand

Mendelian Genetics in Drosophila Melanogaster: Fruit Fly Inheritance Results Total count for section & course data: Cross | Phenotype | Section 6 Total | Course Total | ap/ap x +/+ | wt | 211 | 2604 | | Apterous | 58 | 824 | | | | | | | | | X(w)X(w) x X(+)Y | wt females | 15 | 707 | | white females | 9 | 597 | | wt males | 13 | 633 | | White males | 13 | 614 | Totals | 760 | 11,754 | Table 1: Total counts for section and course data. Four crosses were

Name: Samantha Pipher Section: 03 1. Describe the sex and phenotype of the mutant fly. Describe the phenotype as it compares to the wild type. You can obtain this information by clicking on the fly and looking at the Properties window. The sex of the grounded mutant fly is female and the phenotype as compared to the wildtype is wingless, but otherwise normal for other traits besides wings. This would be directly compared to the normal (winged) wildtype phenotype that is represented by