Types of Twins: Monozygotic vs Dizygotic
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Questions and Answers

What is the main genetic difference between monozygotic and dizygotic twins?

  • Monozygotic twins share 25% of their genetic material, while dizygotic twins share 75%.
  • Monozygotic twins share 100% of their genetic material, while dizygotic twins share only about 50%. (correct)
  • Monozygotic twins share 50% of their genetic material, while dizygotic twins share 100%.
  • Monozygotic twins share 75% of their genetic material, while dizygotic twins share 25%.

    • Which condition can arise when monozygotic twins share a single placenta?

  • Amniotic sac deficiency
  • Twin-to-twin transfusion syndrome (correct)
  • Genetic imbalance disorder
  • Placenta sharing syndrome

    • What environmental factors can influence both monozygotic and dizygotic twins?

  • Mother's age, weight, and lifestyle choices (correct)
  • Sibling's age, weight, and lifestyle choices
  • Father's age, weight, and lifestyle choices
  • Grandparents' age, weight, and lifestyle choices

    • In terms of appearance and health outcomes, what may contribute to differences between monozygotic twins?

    <p>Environmental factors and genetic mutations</p> Signup and view all the answers

    How do dizygotic twins develop compared to monozygotic twins?

    <p>From two separate eggs fertilized by two different sperm</p> Signup and view all the answers

    What is the difference in the genetic material shared by monozygotic and dizygotic twins?

    <p>~50%</p> Signup and view all the answers

    How do monozygotic twins develop from a genetic standpoint?

    <p>~50% shared genetic material due to single fertilization</p> Signup and view all the answers

    Which factor may not necessarily contribute to differences in appearance between monozygotic twins?

    <p><em>Food availability</em></p> Signup and view all the answers

    Influence on growth and development of twins can vary based on what factor?

    <p><em>Number of amniotic sacs and placentas they share</em></p> Signup and view all the answers

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