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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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It sida it saw lafat to laems ni toe,ru nda hte ueqsniot skdea toabu lvie bnro pfsf.gnori nSeic eht meals raโ€™net ibneg nrbo in hte risft claep, I idsa 50% asfemle and %0 ems.la

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hungrybox  cfuk i tog adibet +37
jcrll  vneib-rl"o "fgfirnops โ† aebtdi +29
sympathetikey  Saem :/ +
arkmoses  hms +
niboonsh  ywh is ti 50% emlefas oht? +2
imgdoc  tlef leki na idoit freta i gduerif otu ywh i tgo siht n.owgr +3
temmy  ho sthi! +
suckitnbme  ihTs sitn' ycatlex thrig sa eslma nac tlils eb ornb as dnivedeec by suiddianilv III .,91,61 Tsih lscbaaiyl an lxindke- sveecseir .eaedsis A arreicr tmhroe anc lsitl ssap hre nmlaro X momcsrooeh to a son 05(% cnc)eha. 'stI jtus ahtt teh rehot %50 ccehan of sngpsia na cetdfafe X mhemosroco russtel ni ehtad of hte suetf in re.otu sThu lla mslae tycullaa obnr llwi ton eb e.fdtfaec +6
makinallkindzofgainz  inke,sut@mbc cCr,tore utb fi ryou'e a o-enlbrvi al,em uoy 0%10 orf resu od NOT veha teh eaes,dsi os het ecnhca of a eivolnbr- elma eign"b ecdtefaf" si .0 +8
spow  mbnsi@eutck 'sti tno enk-Xdli ecrse,sevi tosehreiw eevyr lsnieg nos lodwu eb aetfdcef adn orefetrhe aveh eddi ni .toeur I'ts kl-eiXdn nominadt +5
qball  lebiaJ-tiad +
srmtn  erctrco wp@os tceadeff a=seemlf X ldinek nmaDtino +



 +8  upvote downvote
submitted by โˆ—nwinkelmann(366)
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Pedgreie = DXL o(nt lla igrnoaetsen dftefcae = nedkXi-,l ftascfe smael nda mseealf lysairilm = .amoi)nntd

Adfcefte sarehtf = 010% itnisasmsron to gtdahsu,re 0% onansrsstiim ot o.sns
cteAfef d oehmrst = %50 to esatugd,rh 05% nnssriitsoma to tohos s.nB serntap fecedfta = 0%10 amnnsrsositi ot gesrahdtu u(ed to eshatf'r X o,smmh)coero %05 omnissnitars ot snso ued( ot r'otshme X mtchsomreo)ho.Bo spatenr cfdatfee hace irmtnitgtsan otbh to huteadgr msooy(gzohu ae)dgrhut = 05% and remo vseer.e

fI iodoctinn is imuflnroy tfala ot smela ni uroet, enht the 5%0 ecfaedtf asbed no tsosnriimna as( aobv)e lwli ied in etu,or nad hte 50% ont efctfeda lilw vhae vile trh.sbi Tish ,easmn irks of lmafee bneig atcedffe = 05% dan iksr of nbioervl- esmla ebnig cdefetfa = 0.%

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divakhan  I ibeeevl sti tno DXL, hda ti neeb rhtee duolw lltsi be 5%2 cacneh of aselm to eb rlonma idnocgcar ot the Pnttnue au.qers FA( 0202 gPae .95 +
divakhan  ^ %05 hacecn of gebin lro.m.na chihw is NOT ni teh ,rnesaw ti asdi %0 hecacn ni !masel +
divakhan  sPul uyod' ees dsesaie in REVEY trgenanoie fi it saw a.nDotnim Fro it ot eb ,XLD hte ehtarf I,1 oludw have drntitatmes ti to hsi .trudgeah dInaest teh penstar ear arierrc ni eGn I. os ist RXL isaesed I(I, 3 bngei a uyozhoosmg RXL e)eaflm +
plzhelp123  Thsi is din-kXle indnmtoa tki(nh tRte ,nm)ryesod fi ti were ixkd-nle rcevess,ie a efamle uwldo edne to have 2 ffdcatee x mromosscoeh ot be itotsy,mcamp whhic uwdlo name hre fetarh dlwou EVAH to be aspcoyttmmi sa he sha ylon one X och,smoerom hiwhc si ipsimlsebo as he ldowu ahve deihrspe -erinuo.t eTh noarse het nwrsae si 0 in salme si seuceab hte otqineus sask fialcpcisyle tubao lb-nviero amsle. If ti ahd kadse tawh is hte srki fo teh sutef egbni cetfdafe nthe it uwdlo be 05% ni lesam bu(t htat 50% ulwod ont vuevisr ot ibt)hr +2
unknown001  ym dm,cratenomnoei iaodv itgnyr ot igrfeu tuo rtehew ist x dkelin ntdnmoai or ecsis,eerv as oingd so liwl tno leph in ngttige to eth piont of eht ntqu.sioe +1



 +2  upvote downvote
submitted by โˆ—ragacha(17)
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tiio.ranep/wnntemheonniiIittpg:ktei/adkpic.g/wniis_/

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 +0  upvote downvote
submitted by tsp(0)
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sI eth wmnoa ni eht ifstr eigeotnrna 2)(1 nto tfaceedf bsaceeu of ncpeelmtoi ?r21n(ntcea)pee hsa ot veah teh tirat ofr het deissea ot eovledp in het teufur ne.ernoitga

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b1ackcoffee  edesisa ovdeeepdl ude ot remgnlie smisaiocm imouant(t in of the oy)octe +



 +0  upvote downvote
submitted by โˆ—adong(144)
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I ewkn it ahd to eb eXn-kldi aecbseu it dsia ttha ti wsa flata to aeslm owh aevh it ni tue,or ubt I dah a darh mtei ddnieigc eebtenw nmdniota and .isereevsc lyUteliatm ti has ot be Xiledn-k dntmiano aesecbu the daeeftfc reohmt ni hte enscdo atngnieero eavg itbrh ot detefncfau osns hcih(w c'atn pehpan in eiXldn-k rec.sei)vse Taht senma eth tmhero ni qetonsiu si eoygsoeuhzrt and her htgrudesa lwli veah a %05 cchnea of ihtieginrn teh ssadeei wlieh her nsso veah ot eb eetfucdnfa if hyet ,ielv as iopsvrue espsrot eim.denton I tddni' ufiger hist otu uintl ywa tfear teh si..tte.ths eon swa a z.dyoo itlSl ont sure atth ti's LDX aeesbuc hwo ocme boyndo ni the rsitf eng hsa i?t suGesing it was a enustaonspo umati?ton

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 -1  upvote downvote
submitted by โˆ—an_improved_me(91)
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stoenH :qutesion yWh osde it atremt htwa ranpett of eacnitrihne it ?hsa oFr lal we nwok, its ittolfitcn/a-mr'lacau be d.rmeedinet

I leef ielk the sateesi ayw ot ensarw ti s:i knegnawgcdoil it si rmu"noifyl taafl to smale ri-nuteo" = %0 hcacen fro mals;e adn lietg just citnugon hte fiatcnro fo aemesfl in nnaerigteo III thta evha hte eesaids = /46 %.05~

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 -4  upvote downvote
submitted by โˆ—divakhan(18)
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sTih is nto D,XL sit XRL idesase (FA 2020 paeg )59

Her,e hte rhtemo si gozuhoosym rfo eth aimttoun oehetrref esh ssdaliyp eht ssdiee.a

eW see htat,

  1. tI ispsk ninergeotsa
  2. Mlsae era eorm rvsleeey dfeafcet d(ie in rotue)
  3. slFaeem are tffdecae ynl(o ehwn mohgzo)yous

Here ew ,ees hatt rmohte acn pass eeticefdv X ohcmooserm ot 0%5 maflees am&p; orteh %50 iwll eb csiarrer hh(tayle X rmhecmsooo fmro at,hfre eidetcevf from rmhoet o)Fr mla,es etMroh spseas icvdefeet X oechrmomso os ythe ide lyo(n 1 X ch)oeomomsr

roF eht easml how are givlin III( 116, onswh ni epiegr,e)d tyhe vahe nbee ycklu to evsviur due ot mcsos!maii ;)

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b1ackcoffee  nd'ot uyo ihktn ouy ear nogig hrouthg oto yanm sphoo p(?)osnustimas mlea ivsruve deu ot eesioacrmm?i sttB anhecc si esiasde sredatt ued ot enelrmig oamsmicis adn it SI LXD. tbw het deieass is tniciintneano entmpiig on(t yraeesnsc ot owkuory.)n nocdes tlas praa on'tdes mkea ee,nss erda igana hiwt fsreh imnd nda e.tcrpipvees +1
malienca  i ewndears eht iuneqtso keli avinhakd nda it acme uot rihtg. ti lkoso moer like a XRL +



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