L14 DNA errors - Chapter 14 Lecture Guide DNA Errors and...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 14 Lecture Guide DNA Errors and Repair Mutations A heritable change in the genetic material Essential to the continuity of life Source of variation for natural selection New mutations are more likely to be harmful than beneficial DNA repair systems reverse DNA damage Cancer is a disease caused by gene mutations Mutations can be: a. Somatic or germ cell b. Spontaneous Errors in DNA replication Products of metabolic processes such as free radicals Damage to nucleotides Rates vary from species to species and from gene to gene Expected rate of background mutation approximately 1 mutation for every 1 million genes c. Induced Brought on by environmental agents Rate is higher than the spontaneous mutation rate Mutagens are chemical or physical agents Can alter DNA in various ways DNA Repair All living organisms must have the ability to repair changes that occur in DNA in order to minimize mutation Requires…
Image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
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