Polyploidy Origin and Types
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Polyploidy Origin and Types

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Questions and Answers

What is the result of hybridizing two closely related species?

  • Allopolyploidy (correct)
  • Polyploidization
  • Autopolyploidy
  • Aneuploidy

    • What is the main reason why a hybrid plant may be sterile?

  • The plant has too many chromosomes
  • The plant has too few chromosomes
  • The chromosomes are not homologous and cannot synapse properly during meiosis (correct)
  • The plant has an odd number of chromosomes

    • What is an allotetraploid?

  • A polyploid containing the equivalent of six haploid genomes derived from separate species
  • A polyploid containing the equivalent of four haploid genomes derived from separate species (correct)
  • A polyploid containing the equivalent of two haploid genomes derived from the same species
  • A polyploid containing the equivalent of three haploid genomes derived from separate species

    • What is the difference between an allotetraploid and an amphidiploid?

    <p>An amphidiploid is a type of allotetraploid where the original species are known</p> Signup and view all the answers

    Which of the following is an example of an amphidiploid plant?

    <p>Gossypium (cotton)</p> Signup and view all the answers

    What is the key feature of the chromosomes in an allotetraploid plant?

    <p>The chromosomes are not homologous and cannot synapse properly during meiosis</p> Signup and view all the answers

    What is the term used to describe a condition where an individual has more than two haploid sets of chromosomes?

    <p>Polyploidy</p> Signup and view all the answers

    Which of the following syndromes is characterized by the presence of three copies of chromosome 13?

    <p>Patau syndrome</p> Signup and view all the answers

    What is the term used to describe a condition where an individual is missing one or more chromosomes?

    <p>Deletion</p> Signup and view all the answers

    Which of the following statements is true about autosomal monosomies?

    <p>They are rarely found, suggesting monosomic gametes may be functionally impaired.</p> Signup and view all the answers

    What is the term used to describe a condition where an individual has three copies of a particular chromosome?

    <p>Trisomy</p> Signup and view all the answers

    Which of the following statements is true about polyploidy in plants?

    <p>It is prevalent in plants.</p> Signup and view all the answers

    What is autopolyploidy?

    <p>The addition of one or more sets of chromosomes from the same species</p> Signup and view all the answers

    How can autotetraploidy arise?

    <p>All of the above</p> Signup and view all the answers

    What is the role of colchicine in inducing autotetraploidy?

    <p>It inhibits mitosis by preventing tubulin polymerization</p> Signup and view all the answers

    What is allopolyploidy?

    <p>The combination of chromosome sets from different species</p> Signup and view all the answers

    Which of the following is NOT a characteristic of autopolyploidy?

    <p>It involves chromosome sets from different species</p> Signup and view all the answers

    What is aneuploidy?

    <p>An abnormal number of chromosomes that is not a multiple of the haploid set</p> Signup and view all the answers

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