Genetic Disorders and Chromosome Abnormalities
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Questions and Answers

What is the total number of chromosomes in most humans?

  • 48
  • 46 (correct)
  • 44
  • 42
  • Which genetic disorder is specifically caused by having three copies of chromosome 21?

  • Cystic fibrosis
  • Turner syndrome
  • Klinefelter syndrome
  • Down syndrome (correct)
  • What symptom is commonly associated with Down syndrome?

  • Increased height for age
  • Enhanced vision
  • Flattened facial features (correct)
  • Prolonged lifespan
  • What type of genetic issue can lead to an extra chromosome?

    <p>Problems in cell division</p> Signup and view all the answers

    Which of the following is NOT a characteristic of Down syndrome?

    <p>Increased brain capacity</p> Signup and view all the answers

    Study Notes

    Genetic Disorders Due to Chromosome Abnormalities

    • Genetic disorders can arise from missing or extra chromosomes.
    • Normal humans possess 23 pairs (46 total) of chromosomes.
    • Errors during cell division (sperm, egg, or embryo) can lead to extra copies of chromosomes.
    • Down syndrome results from an extra copy of chromosome 21.
    • Down syndrome involves a range of symptoms.
    • Symptoms of Down syndrome include: flattened facial features, upward-slanting eyes, and short stature for age.
    • Down syndrome often includes delayed mental and social development.

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    Description

    This quiz explores genetic disorders stemming from chromosome abnormalities, specifically focusing on Down syndrome. Learn about the characteristics of individuals with Down syndrome, including physical features and developmental challenges. Delve into how extra or missing chromosomes can affect human genetics.

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