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ANSC 305 Exam 1 Questions & Answers 2024/2025 $8.49   Add to cart

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ANSC 305 Exam 1 Questions & Answers 2024/2025

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ANSC 305 Exam 1 Questions & Answers 2024/2025 Relationship coefficient - ANSWERSEstimated fraction of genes that are the same due to ancestry Rxy=(CovXY)sqrt((1+Fx)(1+Fy)) Inbreeding - ANSWERSIncreases shared genes and homozygosity And animal is inbred if its parents are related Wh...

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  • September 6, 2024
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ANSC 305 Exam 1 Questions & Answers
2024/2025

Relationship coefficient - ANSWERSEstimated fraction of genes that are the same due to ancestry



Rxy=(CovXY)\sqrt((1+Fx)(1+Fy))



Inbreeding - ANSWERSIncreases shared genes and homozygosity



And animal is inbred if its parents are related



Why do inbred animals tend to be more genetically similar? - ANSWERSSince inbreeding increases
homozygosity, an inbred animal will pass down the same allele to its offspring



Progeny testing - ANSWERSTest for a recessive gene; a phenotypically dominant animal (X) that could be
homozygous dominant is mated to animals that could produce homozygous recessive offspring if M is a
heterozygote. 2 possible outcomes:

1. One or more homozygous recessive offspring: X has 0 probability of being homozygous dominant

2. All offspring are phenotypically dominant: probability of X being homozygous dominant increases,
based on LoC



Inbreeding coefficient (Fx) - ANSWERSEstimated fraction of gene pairs that are homozygous due to
inbreeding



If parents of X are W and Z...



Fx=1/2*CovWZ



Level of Confidence - ANSWERSProbability of detection, and measure of how good the test is

, LoC=1-(all mates multiplied)(PAA+PAa(3/4)^ni+Paa(1/2)ni)



n=number of mates

ni=number of offspring out of the ith mate

PAA,PAa, Paa= prob that a mate is homo dom., hetero, or homo rec.



Probability of homozygous dominant - ANSWERSPo=(1+Ps+Pd+Psd)/(3+Ps+Pd-Psd)



After offspring:

P(HD|CT)= Po/(1-(LoC(1-Po))



Hog color genetics - ANSWERS4 primary genes:

I-> white, IL= white belt, i=base color



K= normal, kk= six white points



E=black, EP=black spots on base color, e=non-black



DD= white/off white, Dd=sandy, dd=red



Blue butt - ANSWERSE_ __ __ IIL or E_ __ __ Ii



White with dark skin spots (hog color) - ANSWERSEp/e_DD__IL or Ii



White with red tint and few dark skin spots (hog color) - ANSWERSEp/e_ _d __ IL or Ii



Completely white (hog color) - ANSWERSII

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