Gregor Johann Mendel: Father of Genetics
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Questions and Answers

What did Gregor Mendel do between 1856 and 1863?

  • He became a monk at a monastery
  • He taught biology and had an interest in statistics
  • He studied at the University of Vienna
  • He grew and tested over 28,000 pea plants (correct)
  • How did Mendel ensure certain pea plants only self-pollinated?

  • By cutting away the stamen of each flower (correct)
  • By spraying pesticides on the plants
  • By removing the pistil of each flower
  • By adding extra nutrients to the soil
  • What did Mendel conclude from crossing purebred tall and short pea plants?

  • Traits blend together
  • Short traits disappear completely (correct)
  • Tall traits disappear completely
  • All offspring were medium-sized
  • What did Mendel state physical traits were inherited as?

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

    What was the first thing Mendel did in his experiment technique?

    <p>Create a true-breeding generation</p> Signup and view all the answers

    What was one advantage of using Mendel's peas in his experiments?

    <p>Easy to manipulate fertilization</p> Signup and view all the answers

    What term is used to describe the alternative forms of genes?

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

    Which type of gene is represented by a lowercase letter?

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

    What does the Principle of Dominance state?

    <p>Some alleles are dominant, and others are recessive</p> Signup and view all the answers

    What did Mendel's Law of Dominance imply for the offspring?

    <p>All offspring will be heterozygous and express only the dominant trait</p> Signup and view all the answers

    What is the Principle of Segregation according to Mendel?

    <p>Alleles for each trait separate during gamete formation</p> Signup and view all the answers

    How many genes does an organism inherit for each characteristic according to Mendel?

    <p>One gene from each parent</p> Signup and view all the answers

    What principle states that each pair of alleles segregates independently during gamete formation?

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

    In a dihybrid cross, if the parents are RrYy and RrYy, what is the probability of producing offspring with round and yellow seeds?

    <p>9/16</p> Signup and view all the answers

    Which statement contradicts Mendel's principles of genetics?

    <p>Alleles segregate dependently during gamete formation.</p> Signup and view all the answers

    What term describes alleles that have been altered by mutation?

    <p>Mutant alleles</p> Signup and view all the answers

    What is the significance of the 9:3:3:1 phenotypic ratio in a dihybrid cross?

    <p>It predicts the probability of producing offspring with specific traits.</p> Signup and view all the answers

    In genetics, which term refers to the various ways in which a pair of alleles can affect the phenotype?

    <p>Dominance relations</p> Signup and view all the answers

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