Genetics 1.7: Model Genetic Organisms and Early Heredity Concepts
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Questions and Answers

What did Mendel do differently from earlier investigators?

  • He focused on observational studies without formulating hypotheses
  • He described the results of crosses without conducting experiments
  • He adopted an experimental approach and formulated hypotheses (correct)
  • He relied on anecdotal evidence rather than careful records
  • What did Mendel always use to interpret his results?

  • Qualitative descriptions
  • Observational studies
  • Anecdotal evidence
  • Careful records and mathematics (correct)
  • What did the germ-plasm theory propose?

  • Genes blend and mix
  • Traits are inherited in accord with defined principles
  • All cells contain a complete set of genetic information (correct)
  • Genetic information travels from different parts of the body to reproductive organs
  • What was the concept of blending inheritance related to?

    <p>Genes blending and mixing</p> Signup and view all the answers

    Which theory proposed that genetic information travels from different parts of the body to reproductive organs?

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

    What did the cell theory propose about the origin of cells?

    <p>Cells arise only from cells</p> Signup and view all the answers

    What did Mendel conclude about the F1 plants in his monohybrid crosses?

    <p>They inherit genetic factors from both parents</p> Signup and view all the answers

    What did Mendel term the traits that appeared unchanged in the F1 heterozygous offspring?

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

    What is the Principle of Segregation also known as?

    <p>Mendel's first law</p> Signup and view all the answers

    What did Mendel reason about the genetic factors in the F1 plants?

    <p>They inherit genetic factors from both parents</p> Signup and view all the answers

    Which theory was developed in the early 1900s by Sutton and Boveri?

    <p>Chromosomal Theory of Inheritance</p> Signup and view all the answers

    What type of plants did Mendel use for his experiments?

    <p>Annual plants</p> Signup and view all the answers

    What did Mendel term the traits that disappeared in the F1 heterozygous offspring?

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

    'The loci for any two characters studied simultaneousy in a dihybrid cross were located far apart in most cases' illustrates which concept?

    <p>'The Theory of Independent Assortment'</p> Signup and view all the answers

    What determined the characters in Mendel’s peas according to the text?

    <p>Only genotype</p> Signup and view all the answers

    Who independently confirmed Mendel’s conclusions around year 1900?

    <p>Hugo de Vries, Erich Tschermark and Carl Correns</p> Signup and view all the answers

    Why was Mendel successful in his genetic experiments?

    <p>He conducted additional crosses to test his hypotheses</p> Signup and view all the answers

    Which concept of heredity proposed that all traits are inherited from one parent?

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

    What was the key feature of Mendel's approach that distinguished him from earlier investigators?

    <p>He formulated hypotheses and conducted experimental crosses to test them</p> Signup and view all the answers

    Which theory proposed that genetic information travels from different parts of the body to reproductive organs?

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

    What did Mendel always use to interpret his results?

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

    According to Mendel, what determines the characters in peas?

    <p>Mendelian inheritance</p> Signup and view all the answers

    What did Mendel term as dominant in the F1 heterozygous offspring?

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

    What concept did Mendel's conclusion about the F1 plants in his monohybrid crosses form the basis of?

    <p>The Principle of Segregation</p> Signup and view all the answers

    What did Mendel conclude about the genetic factors in the F1 plants?

    <p>They separate when gametes are formed</p> Signup and view all the answers

    What did Mendel use for his experiments?

    <p>Pea plants</p> Signup and view all the answers

    What concept did Mendel illustrate by stating that the loci for any two characters studied simultaneously in a dihybrid cross were located far apart in most cases?

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

    Who independently confirmed Mendel’s conclusions around the year 1900?

    <p>Hugo de Vries</p> Signup and view all the answers

    Which theory proposed that genetic information travels from different parts of the body to reproductive organs?

    <p>Germ-plasm theory</p> Signup and view all the answers

    'He was adept at seeing patterns in detail' suggests Mendel’s ability to:

    <p>Conduct thorough experiments</p> Signup and view all the answers

    What did Mendel conclude about the F1 heterozygous offspring that displayed the phenotype of only one parent?

    <p>They inherited genetic factors from both parents</p> Signup and view all the answers

    What did Mendel use to illustrate his first law?

    <p>Monohybrid crosses</p> Signup and view all the answers

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