Sex-Linked Inheritance Quiz
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Questions and Answers

Which of the following is a characteristic of sex-linked inheritance?

  • It is characterized by X-linked recessive and dominant conditions (correct)
  • It affects males and females equally
  • It occurs when a gene mutation is present on a non-sex chromosome
  • It is only observed in humans
  • Which statement about X-linked conditions is true?

  • X-linked conditions affect males and females equally
  • Females are always affected by X-linked conditions
  • Both males and females can be carriers for X-linked conditions (correct)
  • Males are more commonly carriers for X-linked conditions
  • Why are there more X-linked conditions than Y-linked conditions in humans?

  • Y-linked conditions are more lethal and result in fewer offspring
  • Humans have more genes on the X chromosome than the Y chromosome (correct)
  • Y-linked conditions are more common in females
  • X-linked conditions are more common in males
  • In X-linked recessive inheritance, which individuals are more commonly affected?

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

    What is the role of the second X chromosome in males?

    <p>It carries a healthy copy of the gene</p> Signup and view all the answers

    Study Notes

    Sex-Linked Inheritance

    • A characteristic of sex-linked inheritance is that the genes are located on the sex chromosomes (X or Y).
    • X-linked conditions are more common than Y-linked conditions in humans because the X chromosome has more genes than the Y chromosome.

    X-Linked Recessive Inheritance

    • In X-linked recessive inheritance, males are more commonly affected because they only have one X chromosome, so a single mutated gene is enough to express the condition.
    • Females, on the other hand, are carriers of the condition but are less likely to be affected because they have a second X chromosome that can provide a functional copy of the gene.

    Role of the Second X Chromosome

    • In females, the second X chromosome plays a crucial role in X-linked recessive inheritance by providing a functional copy of the gene, which can compensate for the mutated gene on the other X chromosome.

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    Description

    Test your knowledge of sex-linked inheritance and presentation with this quiz. Learn about X-linked recessive, X-linked dominant, and Y-linked traits and how they differ depending on the sex of the parent and child.

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