Index Card - Test 2 Front

Index Card - Test 2 Front - What conditions have to be...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
What conditions have to be present for a trait to evolve? Mating between two individuals, mutation, and random selection. Reproduction needs to exist. What is evolution? Evolution describes how allele frequencies change and species adapt as a result if: traits are heritable, traits very between individuals, and traits lead to differential reproduction. What are the types of evidence we have that evolution happened and all life on earth has a single ancestor? An example of this would be the evolution of social behavior in chimpanzees. What is heritability? How can you find out whether a trait is heritable? Heritability is when anything is capable of being passed from generation to generation. A trait is heritable because the formation of the brain and specific circuits, even the potential to learn, all require information before learning: genetic information. Any variation in that genetic information is heritable. How many genes influence behavior? No single gene determines a particular behavior. Behaviors are complex traits involving multiple genes that are affected by a variety of other factors. This fact often gets overlooked in media reports hyping scientific breakthroughs on gene function, and, unfortunately, this can be very misleading to the public. What evidence do we have that many behaviors are heritable (via genes)? DNA would be an example of the heritable behaviors that are present while viewing genes. Can a learned behavior evolve? Explain. Yes.
Image of page 1
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