Ch-15-Test-Questions no diagram

What is the source of the extra chromosome 21 in an

Info icon This preview shows pages 12–15. Sign up to view the full content.

View Full Document Right Arrow Icon
49) What is the source of the extra chromosome 21 in an individual with Down syndrome? A) Nondisjunction in the mother only
Image of page 12

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
B) Nondisjunction in the father only C) Duplication of the chromosome D) Nondisjunction or translocation in either parent E) It is impossible to detect with current technology Answer: D Topic: Concept 15.4 Skill: Knowledge/Comprehension 50) Down syndrome has a frequency in the U.S. population of ~ 1/700 live births. In which of the following groups would you expect this to be significantly higher? 51) A couple has a child with Down syndrome when the mother is 39 years old at the time of delivery. Which is the most probable cause? 52) In 1956 Tijo and Levan first successfully counted human chromosomes. The reason it would have taken so many years to have done so would have included all but which of the following? 53) At which phase(s) is it preferable to obtain chromosomes to prepare a karyotype? A) Early prophase B) Late telophase C) Anaphase D) Late anaphase or early telophase
Image of page 13
E) Late prophase or metaphase Answer: E Topic: Concept 15.4 Skill: Knowledge/Comprehension 54) In order for chromosomes to undergo inversion or translocation, which of the following is required? 55) Which of the following statements describes genomic imprinting?
Image of page 14

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 15
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern