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submitted by taway(6),

Just as a note for anybody else who was WTF at how 2(29/30)(30/30) = 1/15...a lot of question banks round 29/30 (or any similarly large fraction) out to 1

gh889  I think you meant 2(29/30)(1/30) just to clarify! +3  
niboonsh  i am confusion +  
arkmoses  You have to use the hardy weinberg formula (1=p^2+2qp+q^2)and p + q = 1 they basically tell you that q^2=1/900 which makes q=1/30 now you can figure out (p=1-q) so p=1-(1/30), p=29/30 then to figure out carrier you solve for 2qp, 2(29/30)(1/30)=1/15 I got it wrong cuz I forgot how to figure out p but hopefully wont happen on the real deal. +3  
garibay92  2pq= 2(29/30)(1/30).... Transform this to 2 1 1 2 1 x x = _ = ____ 1 1 30 30 15 +  
garibay92  Nevermind :/ It didn't come out as planned :( +  
garibay92  /Users/carlosgutierrez/Desktop/IMG_2423.jpg +  


submitted by taway(6),

Just as a note for anybody else who was WTF at how 2(29/30)(30/30) = 1/15...a lot of question banks round 29/30 (or any similarly large fraction) out to 1

gh889  I think you meant 2(29/30)(1/30) just to clarify! +3  
niboonsh  i am confusion +  
arkmoses  You have to use the hardy weinberg formula (1=p^2+2qp+q^2)and p + q = 1 they basically tell you that q^2=1/900 which makes q=1/30 now you can figure out (p=1-q) so p=1-(1/30), p=29/30 then to figure out carrier you solve for 2qp, 2(29/30)(1/30)=1/15 I got it wrong cuz I forgot how to figure out p but hopefully wont happen on the real deal. +3  
garibay92  2pq= 2(29/30)(1/30).... Transform this to 2 1 1 2 1 x x = _ = ____ 1 1 30 30 15 +  
garibay92  Nevermind :/ It didn't come out as planned :( +  
garibay92  /Users/carlosgutierrez/Desktop/IMG_2423.jpg +  


submitted by taway(6),

Just as a note for anybody else who was WTF at how 2(29/30)(30/30) = 1/15...a lot of question banks round 29/30 (or any similarly large fraction) out to 1

gh889  I think you meant 2(29/30)(1/30) just to clarify! +3  
niboonsh  i am confusion +  
arkmoses  You have to use the hardy weinberg formula (1=p^2+2qp+q^2)and p + q = 1 they basically tell you that q^2=1/900 which makes q=1/30 now you can figure out (p=1-q) so p=1-(1/30), p=29/30 then to figure out carrier you solve for 2qp, 2(29/30)(1/30)=1/15 I got it wrong cuz I forgot how to figure out p but hopefully wont happen on the real deal. +3  
garibay92  2pq= 2(29/30)(1/30).... Transform this to 2 1 1 2 1 x x = _ = ____ 1 1 30 30 15 +  
garibay92  Nevermind :/ It didn't come out as planned :( +  
garibay92  /Users/carlosgutierrez/Desktop/IMG_2423.jpg +  


submitted by moo(0),

if the lungs were clear to auscultation and the kid even said he doesn't want to be on the team anymore why couldn't it be malingering?

amarousis  malingering would be a conscious faking of symptoms to avoid being on the team. he wouldn't have the mid-systolic click and he would probably complain of his symptoms all the time and not just limited to during exertion. +  
temmy  malingering is also doing it for some external gain. which was not indicated in the stem +  
garibay92  Also, patients with asthma are usually asymptomatic at the time of physical exam unless they are examined precisely during the attack. +  


submitted by neonem(230),

Major risk factor for aortic dissection is hypertension, and in this case might be due to cocaine use, which causes marked hypertension. Dissections cause a tear in the tunica intima -- blood can flow backwards into the pericardium and cause tamponade. This manifests as crackles in the lung due to poor left ventricular function (filling/diastolic problem due to compression).

forerofore  there is another clue, the man has diminished pulses in just one arm, which means that the left subclavian artery must be involved somehow, and an aortic dissection would be the best answer explaining this. +3  
temmy  please why is there where a diastolic mumur? +1  
whoissaad  @temmy Aortic dissection especially near the root of aorta can lead to dilatation of the aortic valves, which can lead to Aortic regurgitation (diastoic murmur at left sternal border) +2  
garibay92  Does anyone know why is this patient's tepmerature elevated? +  
ratadecalle  @garibay92, not important for this question I think but cocaine can cause malignant hyperthermia +1