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Kaplan Qbank USMLE



Author3 Posts
  #1

I'm very confused with the single gene disorder question on NBME 2. It shows a pedigree with different cancers in the family down generations -- the cancers being Breast (age of onset (AOG) 28, 36 & 51), myxofibrosarcoma (AOG 48), medulloblastoma ( AOG 5) and rhabdomyosarcoma (AOG 8). The choices were:

anticipation, genetic heterogeneity, incomplete penetrance, multifactorial inheriatance and variable expressivity.


  #2

The question told you is about the single gene defect?
Because if is single gene defect I guess is about variable expressivity.
If they didn't talk about single gene defect is about multifactorial inheritance ( multiple loci involved).

  #3

agree w/ blueocean, should be expresivity

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