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Retired NBME 21 Answers

nbme21/Block 1/Question#47 (reveal difficulty score)
A 26-year-old woman (III-2) comes to the ...
50% in females but near 0 in males ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
tags: genetics pedigree

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 +18  upvote downvote
submitted by โˆ—drmantistoboggan4(18)
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tI disa it was alaft ot elmas in otreu, nda eht soutnqie adsek aotub viel rnbo .gfonpsirf incSe the easml โ€™arent beign onbr ni eth fstri ale,pc I sadi %50 esamelf dan %0 lms.ea

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hungrybox  ckuf i otg teadib +37
jcrll  lier"v-obn "nfpgrifos โ† ibeatd +29
sympathetikey  mSae :/ +
arkmoses  hsm +
niboonsh  wyh is it 05% slefame t?oh +2
imgdoc  fetl elki an oidti artef i eurdifg uto yhw i ogt ihst nwgor. +3
temmy  oh tsi!h +
suckitnbme  isTh nsti' tcyexla right sa males acn ilstl eb bron as neevdedic by idvinaudlsi III .961,1, ihTs aslalbyic na i-ndexlk esservcei eads.eis A racerri mtoher nac ltisl saps hre mrnaol X hsroommceo to a osn 0(5% cenh.c)a I'st sutj ahtt teh rhote 05% ncehca fo napisgs an ecaeftfd X homcrsoeom surtlse in headt of eth suetf in u.troe hsTu lal eslam tlcayula born lwil ton be ftfcea.ed +6
makinallkindzofgainz  i@,nemscktub o,Ccertr but if ueor'y a orvnlbie- ,aelm yuo %100 ofr seur od TON heva teh id,saees os eth ccnhea of a ienrlbov- leam nbg"ie f"tefaedc is .0 +8
spow  numb@isektc s'ti not -eilXknd reseiesvc, orsieweht ryeev snlieg son wlodu be dtecffae and rteehfore veah eidd in u.oert Its' lXinke-d onndmita +5
qball  atedi-aiJbl +
srmtn  ctrocre p@wso cedfefta asf=leem X lidnek matnoinD +



 +8  upvote downvote
submitted by โˆ—nwinkelmann(366)
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Piedereg = LXD o(nt all aonitsenerg dcefafet = ,Xke-dinl cesftfa aelsm and eeasflm iiraymlsl = tn.ani)mdo

dfftceAe fehsrat = 001% msitisonnsar ot sg,duareht %0 tnsiorsnmsai ot onss.
dcA etfef eormsth = %05 to ug,adrsthe 0%5 nmssiaitsrno to soo.nt Bsh nrespat cfdafeet = 10%0 rosmanntsiis ot easturdhg d(ue ot rfeash't X )mohreoosm,c 5%0 insnsratsimo to noss (deu ot rh'sotem X )oh.ohmmoBotcrse resapnt faedcfte ceha itantngisrmt obht ot uetadrhg ohgzooms(uy adgte)urh = 5%0 dna orme ves.eer

fI oicoindnt si ufrmoinyl atalf to seaml in tureo, tenh teh 50% aecfetfd bsaed no sanroitsnmi sa( oe)bav lwli die ni t,erou and het %05 ont eteffcad llwi eavh ilev hrstbi. sThi ne,ams ksir of leamfe gbein dcaftefe = 05% nda irsk of nvriolbe- lmaes enbig fedceaft = .%0

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divakhan  I evleibe sti ont ,XDL ahd ti eben ereht ldouw ltlsi be 25% ceachn fo lemas ot be amrnlo rancgiocd to eth utnenPt .urqaes F(A 0220 aegP 59. +
divakhan  ^ 05% hcacne fo gbein arm..onl whhci is NTO in teh arswen, it disa %0 canche in el!msa +
divakhan  lPsu uoyd' ees dseaeis in EVERY tagrneneio if ti aws nmotDain. Fro ti ot be DXL, eht taehfr ,I1 owldu evha tdnaismertt it ot shi gdreah.tu sdeaItn het arpetns rea crrirae ni neG .I so sit XLR sdseiae ,(II 3 ginbe a moshuoyogz LXR mf)eale +
plzhelp123  sThi si Xekn-idl nmtniado h(itkn etRt seon)r,dym if it rewe ldexnki- eirveses,c a emfela loudw dene ot avhe 2 feceatfd x rhmsocmoeos ot eb ,tcoitampysm wihch ouwdl name her aehfrt ulodw VHAE ot eb ttapmmsoiyc as he sha noyl eon X sc,ooerhomm hihwc si bssmplieoi sa eh wlodu evah rpsehedi rou-inte. hTe osaern eht aerwns is 0 ni asmel is casbuee the istqonue skas sifeclpaylic otbua i-boenlvr alems. fI ti dha adkse twah is teh rsik fo teh ufste ngbie tacfeedf hetn it lwuod be %50 in eamls utb( that 05% dlwuo ont sevruvi to htir)b +2
unknown001  my eaotdri,cnemnom daiov giytnr to eguirf tou teerhw sti x ldknei ionatdmn ro rise,svcee as ndgio so lwil nto ephl in tegnitg to het tpino fo the qoiuent.s +1



 +2  upvote downvote
submitted by โˆ—ragacha(17)
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o_egnIhimn.ttritnn/iig.dsnkkni/i/:cptaoep/itaiwpweei

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 +0  upvote downvote
submitted by tsp(0)
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Is eth wnmoa in hte trsif ognitarene 1)(2 ton dfcefate becesua of tmeoepnlci ?ne()eren1t2cap ash to vhea eht itrat fro hte dseseia ot polvede ni hte eurtfu rtn.ngoaeei

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b1ackcoffee  eedaiss edleodepv deu to emnegrli siioamcsm (tonaiutm in fo eth oc)toey +



 +0  upvote downvote
submitted by โˆ—adong(144)
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I wken it had ot be lkX-endi asecbue ti isad that ti aws aftla ot ealsm how ehav ti ni etuor, tbu I hda a dahr mtei gdidneic weeetnb moniatdn dan ecei.rvess tmeUlyilat ti ash ot eb leXindk- dointman scbeeua the efdtfcae mehtor in teh sdnoec ntgerionea avge hirbt ot duaceteffn ssno whhc(i 'ctna pehapn in -Xldneki vsir.ce)ees taTh msaen eth termoh ni ienqouts is hzotgoueyesr nad erh tgsaudhre lwli eavh a %05 ncchae of htneigirin eth esdeias iwlhe rhe sons avhe ot eb decfufeant if tyhe ,vlei as vepiurso srospet doinnmet.e I 'nddit urgeif tshi uot nliut way eftra eht .eih.ststt. oen swa a yz.doo lliSt ton erus tath it's XLD cebseua hwo ocem oodnby in het tfisr gne ahs t?i snGugsie it was a taonsoesunp ?toimtaun

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 -1  upvote downvote
submitted by โˆ—an_improved_me(91)
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sHtnoe nuise:oqt yhW eods it maetrt what nettpra of terinihcnae ti ha?s rFo all we k,won its afliontuicaat'mctlr/- be dtideemr.ne

I elfe lkei the easiets way ot aensrw ti si: ngceolidknagw it is fyol"inumr flata ot mesla urointe"- = %0 anhcec fro mla;es nad lgtie jtsu ntogucni eht arctionf of meeslfa in rnneieatgo III atth aehv teh seidase = 4/6 ~%5.0

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 -4  upvote downvote
submitted by โˆ—divakhan(18)
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siTh is ont ,LDX sti LRX esadsei A(F 2020 peag 59)

He,re eth hetrmo is ygoooszmuh rfo het umtnaoti htroferee esh ldapssyi eth .eeissda

eW see ttah,

  1. It sskpi eoirgtneasn
  2. Msael aer orme yrsvelee ceeaffdt d(ie ni u)erot
  3. leFasme rea eeftdacf oyn(l nehw su)hgzoyomo

eHre ew ees, htta rohtem cna pssa efevitdec X oomsmcerho ot %05 smefael ≈m toher 5%0 wlil eb eircsarr ely(tahh X omeomcsrho form frthae, edevicetf ofrm e) otrroFmh m,asle Morteh sspsea fcedeievt X smrcmhoeoo so htey eid oyln( 1 X eoosmoc)mhr

roF hte alesm woh are invlig III( 11,6 woshn ni p)erei,edg yhte have eneb uclky to ivrsevu ued to !sscmiamoi );

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b1ackcoffee  ontd' uyo nkhti yuo aer nigog hugrtoh oto ynam posho p?ust(sionsam) lame vueisvr deu to tBsrie ?amoietmsc cehacn si sesdaei atdrset eud to erlengim osmciamis adn it SI .XLD twb het iedeass si niineiocnattn mgptenii (otn eecsnyrsa ot o k.noywru) scenod satl rpaa ntsdeo' ekma e,nses daer aniga wtih ershf dmin dna petvp.ceiser +1
malienca  i ardswnee the qisoeunt eikl vniadhka dan ti meac tou tg.ihr it olsko orem eikl a XLR +



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