Genetic crosses Lab - 620 Words

Name: Larken McRorie Date: 12/2/2014 Graded Assignment Lab Report Answer the questions below. When you are finished, submit this assignment to your teacher by the due date for full credit. Lab Report: Genetic Crosses 1 You may wish to construct the Punnett squares on scratch paper first before you fill in the Punnett squares on the Lab Report. Answer the questions below. When you are finished, submit this assignment to your teacher by the due date for full credit. Part 1: Monohybrid Cross—Predicting Freckles in an F1 Generation Apply your understanding of how alleles assort and combine during reproduction to evaluate a scenario involving a monohybrid cross. The allele for having freckles (F) is dominant over the allele for not having†¦show more content†¦Calculate the ratios of the genotypes and phenotypes of the offspring in the F1 generation. Answer: Genotypes: 1FF: 2Ff: 1ff Phenotypes: 3FF: 1ff 3 freckles: 1 nonfreckled Part 2: Dihybrid Cross—Predicting Flower Color and Seed Shape Imagine that you are crossing two plants that are heterozygous for flower color and seed shape. The dominant and recessive alleles for these traits are: purple flowers: P white flowers: p round seeds: R wrinkled seeds: r (2 points) 1. Determine the genotype of each parent plant and write them below. Answer: Genotype of parent plant 1: Pp Rr Genotype of parent plant 2: Pp Rr (4 points) 2. How will the alleles for these traits assort into the gametes that each parent might produce? (Hint: For a reminder on how alleles sort independently into gametes, refer to the illustration in Part 2, Question 2, in the Student Guide.) Answer: Parent plant 1: Gamete 1: PR Gamete 2: Pr PpRr Gamete 3: pr Gamete 4: pR Parent plant 2: Gamete 1: RP Gamete 2: pr GameteShow MoreRelatedThe Genetic Makeup Of The Organism935 Words   |  4 Pagesour traits, whether morphological, physiological, or behavioral. All traits inevitably combine to create a complete set of genetic material, also known as the organism’s genome. 2 The genome in turn creates the organism’s genotype and phenotype. A genotype is simply the genetic makeup of the organism, while the phenotype is the physical and observable expression of this genetic makeup.1 This genotype of organisms can be passed on through mitosis, an asexual process to duplicate and create geneticallyRead MoreWriting Assignment : Materials And Methods1248 Words   |  5 PagesName: Ivy Nguyen Unknown mutant code: 747 PS ID #: 1263065 Lab Section: 16698 (M2) BIOL 3311 Fall 2016 TA Instructor Name: Dominik Awad Date: November 6, 2016 Writing Assignment 4: Materials and Methods, Results, and Brief Discussion/conclusion on the first genetic crosses for the term project Materials and Methods: Maintaining Drosophila melanogaster Cultures. All of the fly stocks used for the study came from one of two places: The Carolina Biological Supply or BloomingtonRead MoreGenetic Mutations And Sex Linked Crosses That Each Generation Of The Fruit Fly Can Make1152 Words   |  5 Pagesover one hundred years. 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Read the background information in the Question Column under â€Å"How can Punnett Squares help predictRead MoreEssay on Examining the Crosses Between Drosophila Fruit Flies614 Words   |  3 PagesExamining the Crosses Between Drosophila Fruit Flies Introduction The major topic of this experiment was to examine two different crosses between Drosophila fruit flies and to determine how many flies of each phenotype were produced. Phenotype refers to an individual’s appearance, where as genotype refers to an individual’s genes. The basic law of genetics that was examined in this lab was formulated by a man often times called the â€Å"father of genetics,† Gregor Mendel. 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We ran two crosses, one with a wild type female and mutant male, and one with a mutant female and wild type male. We then proceeded to look at the two generations following this original cross; the