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1、FinalexamforANPR613:selectedtopicsinpoultrybreedingAnswerthefollowingquestions:,1.Intheresearchpaperswediscussed,youhavebeenintroducedtosomeimportantgenemutationstopoultryindustry:a.Whatarethesymbolsandkindofactionsofthesegenes?(Na,Incd.,FInc.d,sc,re.dw,re.)b.
2、Whatarethetraitsaffectedbythesegenes?(nakedneck,featherless,frizzle,naked,dwarf)c.Describethetraitsaffected?2.TheeffectofsomegenemutationsonsomebroilertraitsarepresentedIntheattachedtables:a.Interpretanddiscusstheinformationspresentedintheattachedtable?b.Based
3、onyourdiscussiondrawsomeconclusions?3.Definethefollowingexpressions:Feedefficiency,Ascitesyndrome,Hypoxia,Hypercapnia,melanosomes,homeostasis.4.WhatarethereasonsthatmaketheeffectofFalleleislesseffectiveinbroilerscomparedtolayers?(affectcurlsfeatherandreducesth
4、eirsizestructurebutnotnumberbutinlayersfrizzledfeathertendtobreakandtheirnumberdecreaseasthebirdsgetolder).5.SomestudiesreportedthatNaalleleincreasesbreastyieldinbroilers.Whatdoyouthinkthereasons?(apparentlyresultedfromahigherrateofproteindepositionandlowersub
5、cutaneousfatdeposition)6.Homozygousnakedneckbirdsareexcludedinthepaperswestudiedthoughtheyhavelessfeatherpercentageandhigherheatdissipation.Whatdoyouthinkthereason?(Poorhatchabilityduetohigherembryonicmortality).7.Whataretheprogenyratioofsimilargenotypeandphen
6、otypeproducedbymatingdouble-heterozygousparentsforthenakedneckandfeatherlessgenes?NanaScscXNanaScscPhenotypicratio:3nanaSc-normal:9Na-Sc-:Nnakedneck:4nanascsc+N-scscnakedGenotypicratio:1NaNaScSc:2NaNaScsc:2NanaScSc:4NanaScsc:2Nanascsc:2nanaScsc:1nanaScSc:1NaNa
7、scsc:1nanascsc8)WhatarethereasonsleadingtoreductioninfertilityunderHighAtandnaturalmating?(reducedspermatogenesis,fewerspermdepositedatcopulation,faultyspermtransfertotheuterovaginalspermstoragetubules,abnormalinteractionsofspermandthespermstoragetubules,impai
8、redspermtransfertothesiteoffertilizationininfundiblums,delayedorfaultyfertilization,abnormalembryogenesis).9)WhatarethemainfactorsaffectingEMliveability?(SeveralfactorsaffectEMlive
