Cell Biology: Heteroploidy Quiz
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Questions and Answers

What is Turner syndrome also known as?

  • Gonadal dysgenesis (correct)
  • Klinefelter syndrome
  • Down syndrome
  • Marfan syndrome
  • Turner syndrome is caused by what chromosomal condition?

  • Trisomy of the X chromosome
  • Monosomy of the X chromosome (correct)
  • Duplication of chromosome 21
  • Deletion of a segment of chromosome 5
  • How frequently does Turner syndrome occur in female newborns?

  • 1 in 100 – 1 in 500
  • 1 in 2000 – 1 in 3000 (correct)
  • 1 in 500 – 1 in 1000
  • 1 in 4000 – 1 in 6000
  • What percentage of fetuses with Turner syndrome are spontaneously aborted during the first trimester of pregnancy?

    <p>About 99%</p> Signup and view all the answers

    What is XXX syndrome also known as?

    <p>Triplo-X syndrome &amp; trisomy X</p> Signup and view all the answers

    XXX syndrome occurs exclusively in which gender and how frequently?

    <p>Females ONLY, about once in every 1,000 female births</p> Signup and view all the answers

    What is Heteroploidy in cell biology?

    <p>An abnormal chromosome number in cells</p> Signup and view all the answers

    What is the primary cause of Heteroploidy?

    <p>Irregular mitosis</p> Signup and view all the answers

    In which type of cells is Heteroploidy most often observed?

    <p>Cancer cells</p> Signup and view all the answers

    What causes Cri du chat syndrome?

    <p>Deletion of part of the short arm of chromosome 5</p> Signup and view all the answers

    What is the incidence rate of Cri du chat syndrome?

    <p>1 in 37,000 to 50,000 live births</p> Signup and view all the answers

    In terms of gender, how does Cri du chat syndrome predominantly occur?

    <p>More common in females</p> Signup and view all the answers

    What is the karyotype of a person with Klinefelter syndrome?

    <p>47,XXY</p> Signup and view all the answers

    Which syndrome is caused by the deletion of a segment of chromosome 5?

    <p>Turner syndrome</p> Signup and view all the answers

    What is the primary cause of Down syndrome?

    <p>Duplication of chromosome 21</p> Signup and view all the answers

    What is the primary cause of Turner syndrome?

    <p>Deletion of part of the X chromosome</p> Signup and view all the answers

    What does 'Haploidy' refer to in cell biology?

    <p>A normal chromosome number in cells</p> Signup and view all the answers

    Where is Heteroploidy most often observed?

    <p>Cancer cells</p> Signup and view all the answers

    What causes Down syndrome?

    <p>Mutation in chromosome 21</p> Signup and view all the answers

    What is the incidence rate of Turner syndrome?

    <p>1 in 100,000 to 120,000 live births</p> Signup and view all the answers

    In terms of gender, how does Turner syndrome predominantly occur?

    <p>More common in females</p> Signup and view all the answers

    Study Notes

    Chromosomal Conditions

    • Turner syndrome is also known as 45,X or 45,X0.
    • Turner syndrome is caused by a chromosomal condition where one of the sex chromosomes is missing or partially deleted.

    Incidence Rate of Turner Syndrome

    • Turner syndrome occurs in approximately 1 in 2,500 to 1 in 5,000 female newborns.

    Spontaneous Abortions

    • Approximately 99% of fetuses with Turner syndrome are spontaneously aborted during the first trimester of pregnancy.

    XXX Syndrome

    • XXX syndrome is also known as Triplo-X syndrome.
    • XXX syndrome occurs exclusively in females and affects approximately 1 in 1,000 females.

    Heteroploidy

    • Heteroploidy refers to a condition in cell biology where a cell contains multiple sets of chromosomes.
    • The primary cause of Heteroploidy is chromosomal duplication or deletion.
    • Heteroploidy is most often observed in cancer cells.

    Cri du Chat Syndrome

    • Cri du chat syndrome is caused by the deletion of a segment of chromosome 5.
    • The incidence rate of Cri du chat syndrome is approximately 1 in 20,000 to 1 in 50,000 births.
    • Cri du chat syndrome predominantly occurs in females.

    Klinefelter Syndrome

    • The karyotype of a person with Klinefelter syndrome is 47,XXY.

    Down Syndrome

    • The primary cause of Down syndrome is the presence of an extra copy of chromosome 21 (trisomy 21).

    Turner Syndrome

    • The primary cause of Turner syndrome is the loss or deletion of a sex chromosome.

    Haploidy

    • 'Haploidy' refers to a cell with a single set of chromosomes.

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    Description

    Test your knowledge of cell biology with this quiz on Heteroploidy. Learn about the definition, causes, and occurrence of Heteroploidy in cells.

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