Mendel's Principles of Heredity Chapter 01 Quiz
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Questions and Answers

What is the basic unit of heredity?

  • Gene (correct)
  • Protein
  • DNA
  • RNA
  • Which genetic disorder is caused by a single change in a single gene?

  • Cystic fibrosis
  • Huntington's disease
  • Sickle-cell anemia (correct)
  • Color blindness
  • According to Mendel, what is essential for following genes from one generation to another?

  • Dominant traits
  • Recessive traits
  • Observable variation (correct)
  • Heredity
  • Which statement reflects one of the general assumptions of Mendel's work?

    <p>Variation is inherited by genetic laws</p> Signup and view all the answers

    Which genetic disorder is an example of a trait caused by complex interactions between many genes?

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

    What encodes a protein or RNA?

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

    What was the focus of Mendel's experiments with pea plants?

    <p>The laws of inheritance</p> Signup and view all the answers

    Which of the following theories contributed to misinterpretation of variation in selective breeding experiments during Mendel's time?

    <p>The homunculus</p> Signup and view all the answers

    What was the key to the success of Mendel's experiments with pea plants?

    <p>Discrete traits that remained constant in crosses within a line</p> Signup and view all the answers

    Which of the following is a key learning objective related to genetic analysis according to Mendel?

    <p>Predicting genotypic and phenotypic ratios among progeny of complex multi-hybrid crosses</p> Signup and view all the answers

    What did Mendel's monohybrid crosses reveal?

    <p>The units of inheritance and the law of segregation</p> Signup and view all the answers

    What did Mendel's paper 'Experiments in plant hybrids' become?

    <p>The cornerstone of modern genetics</p> Signup and view all the answers

    What were two misleading theories of inheritance at the time of Mendel’s studies?

    <p>Homunculus and blended inheritance</p> Signup and view all the answers

    What was Mendel’s experimental organism?

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

    What did Mendel study in peas?

    <p>7</p> Signup and view all the answers

    Which enzyme is encoded by the Y allele?

    <p>Stay green enzyme</p> Signup and view all the answers

    What happens when the r allele is present?

    <p>Sucrose and unbranched starch build up</p> Signup and view all the answers

    According to the molecular explanation, what does the Y allele not make?

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

    What is the effect of the r allele not making Sbe1?

    <p>Sucrose and unbranched starch buildup</p> Signup and view all the answers

    Which genetic disorder exhibits dominant inheritance?

    <p>Familial hypercholesterolemia</p> Signup and view all the answers

    Which of the following diseases is caused by a recessive allele?

    <p>Sickle cell anemia</p> Signup and view all the answers

    What pattern of inheritance does Huntington's disease exhibit?

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

    Which genetic disorder is characterized by a high frequency and caused by a recessive allele?

    <p>Gaucher disease</p> Signup and view all the answers

    In which chromosome is cystic fibrosis located?

    <p>7q</p> Signup and view all the answers

    What is the recurrence risk for each sibling of a proband with autosomal recessive inheritance?

    <p>25%</p> Signup and view all the answers

    Which characteristic is typically seen in autosomal recessive inheritance?

    <p>More common with consanguinity</p> Signup and view all the answers

    What characteristic helps recognize dominant traits in pedigrees?

    <p>Phenotype appears in every generation</p> Signup and view all the answers

    What is the most common single-gene trait caused by a dominant allele in humans?

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

    Which genetic disorder has a chromosome location at 1/1000 and can be caused by a recessive allele?

    <p>Gaucher disease</p> Signup and view all the answers

    Which disease is NOT an example of a single-gene trait caused by a dominant allele?

    <p>Sickle cell anemia</p> Signup and view all the answers

    What pattern of inheritance does cystic fibrosis exhibit?

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

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