Genetics: Inheritance and Variation in Living Organisms
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Questions and Answers

What is the term used to refer to the analysis of traits in several generations of a family?

  • Phenotype analysis
  • Pedigree analysis (correct)
  • Crossing over analysis
  • Genetic mutation analysis

    • In human genetics, what is the purpose of pedigree study?

  • Trace the inheritance of a specific trait, abnormality, or disease (correct)
  • Analyze protein expression levels
  • Identify mutations in DNA
  • Study the phenotypes of individuals

    • Which of the following is true about DNA according to the text?

  • DNA undergoes significant changes with each generation
  • DNA carries genetic information without alteration from one generation to another (correct)
  • DNA is not involved in the inheritance of traits
  • DNA only exists in pea plants

    • What term is used to describe an alteration or change in genetic material?

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

    Which analysis provides an alternative when control crosses are not possible in certain organisms?

    <p>Pedigree analysis</p> Signup and view all the answers

    What does each feature in any organism correspond to according to the text?

    <p>A gene on DNA</p> Signup and view all the answers

    What is the basis of heredity?

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

    What is the degree by which progeny differ from their parents called?

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

    Which branch of biology deals with the inheritance and variation of characters from parents to offspring?

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

    During which century was significant progress made in the understanding of inheritance?

    <p>19th century</p> Signup and view all the answers

    What process involves selectively breeding and selecting organisms with desirable characters?

    <p>Artificial selection</p> Signup and view all the answers

    What is one of the main causes of variation according to early human understanding?

    <p>Sexual reproduction</p> Signup and view all the answers

    Why was Mendel's work on inheritance of characters unrecognised until 1900?

    <p>Communication was not easy in those days and his work could not be widely publicised.</p> Signup and view all the answers

    Which aspect of Mendel's concept was not accepted by his contemporaries?

    <p>The concept of alleles blending with each other.</p> Signup and view all the answers

    What major advancement enabled the rediscovery of Mendel's results in 1900?

    <p>Advancements in microscopy that allowed careful observation of cell division.</p> Signup and view all the answers

    Why did Mendel's use of mathematics to explain biological phenomena face resistance?

    <p>Using mathematics in biology was a new and unacceptable approach at that time.</p> Signup and view all the answers

    Which term did Mendel use to refer to genes in his work?

    <p>'Factors'</p> Signup and view all the answers

    Why were scientists able to rediscover Mendel's results in 1900?

    <p>Advancements in microscopy allowed them to observe cell division more closely.</p> Signup and view all the answers

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