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NBME 23 Answers

nbme23/Block 1/Question#26 (34.6 difficulty score)
A couple comes to the physician for ...
1/150🔍,📺
tags: genetics 

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 +7 
submitted by welpdedelp(242),
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/32 512/ 41/

He hsa a 2/3 enhcac fo nebgi uetzsheyoorg ont( 4/2 b/c we kwno he ofr rsue 'sdtneo aveh CF)

2/51 ehancc in hte otipoaplnu

1/4 ceahnc of a rhtuzgyeoeso coulep avighn a licdh iwth FC

welpdedelp  ok, so it messed up the formatting 0.66667 x 1/25 x 0.25 +  
nwinkelmann  ugh... I ALWAYS forget about changing the carrier status to 2/3. Chance of affected individual = chance of father passing allele * chance of mother passing allele = 2/31/21/25*1/2 = 2/300 = 1/150. +1  
zpatel  2/3(chance of heterozygous) * 1/25(meet carrier) * 1/2(chance of male to transfer affected gen) * 1/2(female to transfer affected gen) = 1/150 +5