1. The SDN iPhone App is back and free through November! Get it today and please post a review on the App Store!
    Dismiss Notice
  2. Dismiss Notice
  3. Guest, be sure to check out How To Get Into Dental School, our free downloadable PDF with step-by-step details for dental school applicants!
    Dismiss Notice
  4. Dismiss Notice
Dismiss Notice

Interview Feedback: Visit Interview Feedback to view and submit interview information.

Interviewing Masterclass: Free masterclass on interviewing from SDN and Medical College of Georgia

Color Blind question

Discussion in 'DAT Discussions' started by bluesdeluxe, Aug 1, 2006.

  1. bluesdeluxe

    bluesdeluxe Member
    2+ Year Member

    Joined:
    Jun 14, 2006
    Messages:
    81
    Likes Received:
    0
    If 1/12 of the males in a population are red-green colorblind, what fraction of females from that population are red-green colorblind?

    a)1/6
    b) 1/12
    C) 1/48
    d) 1/144
    e) no females will have the trait cause rg colorblindness is on a sex chromosome


    the sample test I took with this question had another red-green colorblindness question in the science part and it was a sex linked cell. Seems to me any female who inherited the gene would have another X chromosome that is dominant therefore they would be carries and never be colorblind. The answer guide says it's D cause of 1/12 times 1/12 or something. Is the answer wrong?
     
  2. Note: SDN Members do not see this ad.

  3. keibee82

    keibee82 Blue_tooth...
    2+ Year Member

    Joined:
    May 8, 2006
    Messages:
    476
    Likes Received:
    2
    Status:
    Pre-Dental
    yes it is D. Since rg colorblindness trait is recessive females need both
    recessive traits to be rg colorblind. Therefore 1/12 X 1/12 = 1/144
     

Share This Page