Prep for USMLEPrep for USMLE Forum
   Forum    Step 1  Step 2 CK Step 2 CS Step 3  Match  IMGs Resources Search






Previous Topic | Next Topic  Mode of inheritance of Fragile X 




 
Kaplan Qbank USMLE



Author7 Posts
  #1

in Robbins and First Aid it states that the mode of inheritance is SXR(x-linked recessive) but in Kaplan biochem it says it's SXD(dominant) can anyone tell me which i should follow.....i'm leaning towards recessive but just want to confer.
thanks

  #2

IT'S X-LINKED - so, all males are affected, and female if she heterozygous show no physical signs other than early menopause, but they may have learning difficulties or frank retardation.

___________________
Scientia potentia est
I'm a man

  #3

Id say x-linked recessive
***X-link dominant is rare, I only know of hypophosphatemia and Vit D dependent rickets.

___________________
Smell the coffee! "Is That an Osler move??"

  #4

actually 30-50%of female carriers who have the full mutation(>240 repeats) will have mental retardation,so even in robbins in one place it says SXD while in another SXR,in the text it says variable inheritance but x-linked.

  #5

In this case of ambiguity, I wouldnt worry if anything i could see the usmle just having multiple choice with:
autosomal dominant
"""""""" recessive
mitochondrial
x -linked
y- linked
multifactorial

Ill return with more info.

___________________
Smell the coffee! "Is That an Osler move??"

  #6

YES you r right many books says it SXD AND SOME S says it is SXR I WILL GO W/ SXD .DiaHuq

___________________
just do it!!!

  #7

alport is also x-linked dominant... (plus vit d res and fragile x)... doubtful they would ask it on step one, but at least it helps remeber that these diseases are xlinked

___________________
where i lay my head is home.







You don't have permission to post.




Login or Register to post messages in this topic





















Contact | Leaders | Disclaimer | Privacy

Copyright @ Prep for USMLE. All rights reserved.