Mendel's Pea Plant Experiments
32 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What did Mendel call a heritable feature that varies among individuals?

  • Generation time
  • Variety
  • Trait (correct)
  • Hybridization

    • Why did Mendel choose to work with peas?

  • Peas are easy to control and manipulate for breeding experiments.
  • Peas have a short generation time and produce a large number of offspring. (correct)
  • Peas have multiple varieties with distinct traits such as flower color.
  • Peas have both stamens and carpels in each flower, allowing for self-fertilization.

    • What did Mendel ensure about the plants he used in his experiments?

  • They were cross-pollinated with other plant species.
  • They were true-breeding for the traits he wanted to study. (correct)
  • They were genetically modified to express specific traits.
  • They had a variety of different traits for the same character.

    • What did Mendel call the mating process of two contrasting, true-breeding pea varieties?

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

    Which generation did Mendel check in his typical breeding experiment after the P generation?

    <p>F1</p> Signup and view all the answers

    What term did Mendel use to refer to a plant with purple flowers if the seeds produced by self-pollination in successive generations all give rise to plants with purple flowers?

    <p>True-breeding plant</p> Signup and view all the answers

    What did Mendel observe about the first generation hybrids?

    <p>Only one of the alternative characters usually developed</p> Signup and view all the answers

    What is the term used to describe the phenomenon where dominant alleles are expressed exclusively in a heterozygote?

    <p>Genetic masking</p> Signup and view all the answers

    What is the ratio of purple-flowered to white-flowered F2 plants in Mendel's experiment?

    <p>3:1</p> Signup and view all the answers

    What term is used to describe the heritable factor that didn't disappear but was somehow hidden or masked in the presence of another factor?

    <p>Genetic segregation</p> Signup and view all the answers

    What does Mendel’s law of segregation state about the alleles at a locus?

    <p>Two alleles at a locus can differ, with one being dominant and the other being recessive</p> Signup and view all the answers

    What does Mendel's concept of genes as sequences of nucleotides found in a locus on a chromosome explain?

    <p>How genes determine an organism's appearance</p> Signup and view all the answers

    What is meant by the term 'alleles'?

    <p>Alternative versions of genes responsible for inherited variations</p> Signup and view all the answers

    What is the significance of Mendel's observation that white-flower trait reappeared in the F2 generation?

    <p>It indicated that heritable factors do not disappear but may be hidden or masked</p> Signup and view all the answers

    What does Mendel's law of dominance illustrate about allele expression?

    <p>The dominant allele expresses itself exclusively in a heterozygote.</p> Signup and view all the answers

    What did Mendel deduce about variations in inherited characters from his experiments?

    <p>Variations are accounted for by alternative versions of genes called alleles.</p> Signup and view all the answers

    Why did Mendel choose to work with peas?

    <p>Mendel chose to work with peas because they have many varieties, short generation time, large number of offspring, and the ability for strict control of mating.</p> Signup and view all the answers

    What is the significance of tracking only those characters that occur in two distinct, alternative forms, such as purple or white flower color?

    <p>Tracking characters with distinct alternative forms allowed Mendel to observe clear patterns of inheritance and apply the principles of heredity.</p> Signup and view all the answers

    Explain the term 'true-breeding' as used by Mendel in his experiments.

    <p>A plant with a specific trait is true-breeding if self-pollination in successive generations produces offspring with the same trait, without variation.</p> Signup and view all the answers

    What did Mendel check in the F1 and F2 generations of his typical breeding experiment?

    <p>Mendel checked the offspring of the P generation in the F1 generation, and the offspring of the F1 generation in the F2 generation.</p> Signup and view all the answers

    What is the significance of Mendel's observation that white-flower trait reappeared in the F2 generation?

    <p>The reappearance of the white-flower trait in the F2 generation demonstrated the principle of segregation and the presence of hidden, recessive traits.</p> Signup and view all the answers

    Why did Mendel choose to track characters that occurred in two distinct, alternative forms?

    <p>Mendel chose to track characters with distinct alternative forms to establish clear patterns of inheritance and deduce principles of heredity.</p> Signup and view all the answers

    What did Mendel observe about the genetic contribution of white-flowered plants to the F1 hybrids?

    <p>It reappeared in the F2 generation</p> Signup and view all the answers

    What is the ratio of purple-flowered to white-flowered F2 plants in Mendel's experiment?

    <p>3:1</p> Signup and view all the answers

    What term is used to describe the heritable factor that is hidden or masked in the presence of another factor?

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

    What is meant by the term 'alleles'?

    <p>Alternative versions of genes</p> Signup and view all the answers

    What did Mendel ensure about the plants he used in his experiments?

    <p>True-breeding</p> Signup and view all the answers

    What generation did Mendel check in his typical breeding experiment after the P generation?

    <p>F2 generation</p> Signup and view all the answers

    What does Mendel’s law of segregation state about the alleles at a locus?

    <p>For each character, an organism inherits two copies – two alleles – of a gene, one from each parent.</p> Signup and view all the answers

    What concept does Mendel's law of dominance illustrate about allele expression?

    <p>Dominant alleles are expressed exclusively in a heterozygote</p> Signup and view all the answers

    What is the significance of Mendel's observation that white-flower trait reappeared in the F2 generation?

    <p>It demonstrated the presence of hidden or masked traits</p> Signup and view all the answers

    What does Mendel's concept of genes as sequences of nucleotides found in a locus on a chromosome explain?

    <p>It explains the variations in inherited characters and phenotype of organisms</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser