BIO 340 FINAL EXAM 2025 WITH 100% CORRECT ANSWERS

BIO 340 FINAL EXAM 2025 WITH 100%
CORRECT ANSWERS
Howymanyychromatidsy(total)yareyinyaycellywithydiploidynumberyofy4y(2ny=y4)yifyityisyinyG
2?

A.y4
B.y2
C.y6
D.y8
E.y16y-yCORRECTyANSWER-D.y8

Atywhichypointsyinytheycellycycleydoyyouynotyseeychromosomes,ybutyonlyyuncondensedy
DNA?

A.yDuringyGapy1ywhenyproteinsyforycellygrowthyareybeingymanufactured
B.yDuringySynthesisywhenyDNAyisyreplicated
C.yDuringyGapy2ywhenyproteinymicrotubulesyforytheyspindleyfibersyareybeingymade
D.yDuringyG0ywhenytheycellyisyquiescent
E.yDuringyallyofytheyabovey-yCORRECTyANSWER-E.yDuringyallyofytheyabove

Inyay2ny=y6yorganism,yhowymanyychromatidsyareypresentyinyeachyindividualycellyimmedi
atelyyatytheyendyofymeiosis?

A.y1
B.y2
C.y3
D.y4
E.y6y-yCORRECTyANSWER-C.y3

Inyay2ny=y6yorganism,yhowymanyychromatidsyareypresentyinyeachyindividualycellyatyprop
haseyII?

A.y1
B.y2
C.y3
D.y4
E.y6y-yCORRECTyANSWER-E.y6

Inyay2ny=y6yorganism,yareytheycellsyhaploidyorydiploidyatyprophaseyII?

A.yHaploid
B.yDiploidy-yCORRECTyANSWER-A.yHaploid

,WhatystrategiesywereyhelpfulywhenyGregoryMendelystudiedypatternsyofyinheritance?
I.yStudyyanyorganismywithyaylongygenerationytime
II.yStudyyanyorganismywithyfewyoffspringyperygeneration
III.yFocusyonymanyytraitsyatyaytime
IV.yLookyatydiscontinuousytraits

A.yOnlyyI
B.yOnlyyIII
C.yOnlyyIV
D.yAllyofythese
E.yNoneyofythesey-yCORRECTyANSWER-C.yOnlyyIV

Inyguineaypigsycoatycoloryisydeterminedybyyaysingleygeneywithytwoyalleles.yAyguineaypig
yfromyaytrue-breedingyblackystrainyisymatedywithyayguineaypigyfromyaytrue-
breedingywhiteystrain.yTheyF1yprogenyyareyallyblack.yTwoyofytheyF1yprogenyyareymatedy
withyeachyother.yWhatyproportionyofytheyF2yprogenyyisyexpectedytoybeywhite?

A.y1/4
B.y1/3
C.y1/2
D.y3/4
E.y7/8y-yCORRECTyANSWER-A.y1/4

Inyguineaypigsycoatycoloryisydeterminedybyyaysingleygeneywithytwoyalleles.yAyguineaypig
yfromyaytrue-breedingyblackystrainyisymatedywithyayguineaypigyfromyaytrue-
breedingywhiteystrain.yTheyF1yprogenyyareyallyblack.yTwoyofytheyF1yprogenyyareymatedy
withyeachyother.yWhatyproportionyofytheyblackyF2yprogenyyisyexpectedytoybeyhomozygo
us?

A.y1/4
B.y1/3
C.y1/2
D.y3/4
E.y7/8y-yCORRECTyANSWER-B.y1/3

Inyguineaypigsycoatycoloryisydeterminedybyyaysingleygeneywithytwoyalleles.yAlleleyByisydo
minantyandyencodesyayblackycoat.yAlleleybyisyrecessiveyandyencodesyaywhiteycoat.yIfyyo
uycrossyayblackyguineaypigywithyaywhiteyone,ywhatyisytheyphenotypeyratioyinytheyF1ygen
eration?

A.yAllyblack
B.yAllywhite
C.y1/2yblack,y1/2ywhite
D.y3/4yblack,y1/4ywhite
E.yNeedymoreyinformationy-yCORRECTyANSWER-E.yNeedymoreyinformation

, Youycrossytwoypeayplants,ybothyofywhichyhaveypurpleyflowers.yYouyareysurprisedytoysee
ythatyinytheyfirstygeneration,ythereyareyplantsywithybothypurpleyflowersyandywhiteyflowers.
yWhatyisytheymostylikelyyreasonyforythis?


A.yOneyparentywasyhomozygousyrecessiveyandyoneywasyheterozygous
B.yAynewymutationyoccurred
C.yOneyparentywasyhomozygousyrecessiveyandyoneywasyhomozygousydominant
D.yBothyparentalyplantsywereyheterozygous
E.yOneyparentywasyhomozygousydominantyandyoneywasyheterozygousy-
yCORRECTyANSWER-D.yBothyparentalyplantsywereyheterozygous


MonohybridycrossesyillustrateywhatyimportantylawysuggestedybyyMendel?

A.yLawyofyIndependentyAssortment
B.yLawyofySegregation
C.yLawyandyOrder
D.yLawyofyHeterozygosity
E.yNoneyofytheyabovey-yCORRECTyANSWER-B.yLawyofySegregation

Inyaydihybridycrossy(yellow,yroundyxyyellow,yround),ywhatyproportionyofytheyF2yoffspringy
haveyrecessivey(wrinkled)yseedyshape?

A.y1/8
B.y3/16
C.y1/4
D.y3/4
E.y9/16y-yCORRECTyANSWER-C.y1/4

Inyaydihybridycrossy(yellow,yroundyxyyellow,yround),ywhatyproportionyofytheygreenyF2yoff
springyareyround?

A.y1/8
B.y3/16
C.y1/4
D.y3/4
E.y9/16y-yCORRECTyANSWER-D.y3/4

Inyaydihybridycrossy(yellow,yroundyxyyellow,yround),ywhatyproportionyofytheyF2yoffspringy
willybeybothyheterozygousyforytheycolorygeneyandyhomozygousydominantyforytheyshapey
gene?

A.y1/8
B.y3/16
C.y1/4
D.y3/4
E.y9/16y-yCORRECTyANSWER-A.y1/8