Mendelian Inheritance and Meiosis
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Questions and Answers

What is the correct ratio of phenotypes in the F2 generation of an F1 × F1 cross-fertilization?

  • 1:1
  • 1:2:1
  • 9:3:3:1 (correct)
  • 3:1

    • What is the mechanism responsible for recombination in meiosis?

  • Independent assortment
  • Segregation
  • Crossing over (correct)
  • Fertilization

    • What is the genotype notation for a plant with both dominant alleles for seed color and seed shape?

  • yyrr
  • Yyrr
  • YYRR (correct)
  • YyRr

    • What is the term for the process by which alleles of genes on nonhomologous chromosomes segregate independently during gamete formation?

    <p>Law of Independent Assortment</p> Signup and view all the answers

    What was the organism used by Thomas Hunt Morgan to provide evidence for the chromosome theory of inheritance?

    <p>Fruit flies</p> Signup and view all the answers

    What is the result of crossing over during meiosis?

    <p>Recombination of alleles on the same chromosome</p> Signup and view all the answers

    What is the recombinant frequency between the genes for black and purple flowers if 751 offspring have the wild type and 49 have the gray purple flowers?

    <p>49 / (751 + 49) x 100%</p> Signup and view all the answers

    What is the correct notation for the genotype of an individual with two genes, one with allele w and one with allele m?

    <p>w m+ / w+ m</p> Signup and view all the answers

    What is the relationship between the distance between genes and the recombination frequency?

    <p>The further apart the genes, the higher the recombination frequency.</p> Signup and view all the answers

    What is the result of crossing over between two genes?

    <p>Production of recombinant gametes</p> Signup and view all the answers

    What is the unit of measurement for map distance?

    <p>CentiMorgans (cM)</p> Signup and view all the answers

    What is the range of recombination frequency values?

    <p>0.00-0.50</p> Signup and view all the answers

    What is the recombinant frequency in a cross between a wild type fruit fly and a double mutant fruit fly if there are 1472 parental types and 94 recombinants in a total of 1566 offspring?

    <p>6.4%</p> Signup and view all the answers

    Why do genes that are located on the same chromosome tend to be inherited together?

    <p>Because they are located near each other on the same chromosome</p> Signup and view all the answers

    What is the term for the process by which homologous chromosomes exchange genetic material, resulting in recombinant offspring?

    <p>Crossing over</p> Signup and view all the answers

    What is the notation for the genotype of a wild type fruit fly with gray body color and normal wings?

    <p>b+ b+ vg+ vg+</p> Signup and view all the answers

    What is the term for a gene that is located on the X chromosome?

    <p>X-linked gene</p> Signup and view all the answers

    In a dihybrid cross, what is the expected ratio of offspring if the genes are located on different chromosomes?

    <p>1:1:1:1</p> Signup and view all the answers

    What is the unit of measurement for the distance between two genes on a chromosome?

    <p>Map unit</p> Signup and view all the answers

    What is the term for the genes that are located on the same chromosome and tend to be inherited together?

    <p>Linked genes</p> Signup and view all the answers

    What is the result of crossing over between two homologous chromosomes?

    <p>Recombinant chromosomes</p> Signup and view all the answers

    What is the purpose of a testcross in genetics?

    <p>To determine the linkage of two genes</p> Signup and view all the answers

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