ANSC 4395 FINAL EXAM VERIFIED WITH ACTUAL QUESTIONS AND MARKING SCHEME

ANSC 4395 FINAL EXAM VERIFIED WITH
ACTUAL QUESTIONS AND MARKING
SCHEME
Measured i*- i*CORRECT i*ANSWER-Quantitative i*traits i*are i*those i*that i*can i*be
i*__________________.



Weights

Heights

Litter i*size

Number i*of i*eggs

Racing i*speed i*- i*CORRECT i*ANSWER-Some i*examples i*of i*quantitative i*traits



Many i*pairs i*of i*genes i*- i*CORRECT i*ANSWER-Quantitative i*traits i*are i*controlled i*by



One i*pair i*- i*CORRECT i*ANSWER-Effects i*of i*_______ i*_________ i*of i*genes i*cannot i*be
i*distinguished.



Identical i*- i*CORRECT i*ANSWER-The i*activity i*at i*any i*one i*pair i*of i*genes i*is
i*______________ i*to i*the i*types i*of i*gene i*action i*discussed i*in i*simply-inherited i*traits.



Phenotype i*- i*CORRECT i*ANSWER-The i*outward i*appearance i*of i*an i*individual.



Measurement i*- i*CORRECT i*ANSWER-The i*phenotype i*for i*quantitative i*traits i*is i*usually i*a
i*_____________________.



Sum i*- i*CORRECT i*ANSWER-The i*__________ i*of i*the i*genetic i*and i*environmental i*factors
i*which i*have i*an i*effect.



P i*= i*G i*+ i*E i*- i*CORRECT i*ANSWER-Formula i*for i*phenotype

, Subdivided i*- i*CORRECT i*ANSWER-Both i*genetic i*and i*environmental i*factors i*can i*be
i*___________________ i*into i*more i*explicit i*components.



Additive i*effects

Dominance i*effects

Epistatic i*effects i*- i*CORRECT i*ANSWER-Genetic i*effects i*can i*be i*divided i*into



Additive i*Effect i*- i*CORRECT i*ANSWER-Occur i*when i*two i*or i*more i*genes i*source i*a i*single
i*contribution i*to i*the i*final i*phenotype.



Dominance i*Effect i*- i*CORRECT i*ANSWER-Phenomenon i*of i*one i*variant i*(allele) i*of i*a i*gene
i*on i*a i*chromosome i*masking i*or i*overriding i*the i*effect i*of i*a i*different i*variant i*of i*the
i*same i*gene i*on i*the i*other i*copy i*of i*the i*chromosome.



Epistatic i*Effect i*- i*CORRECT i*ANSWER-The i*phenomenon i*where i*the i*effects i*of i*one i*gene
i*are i*modified i*by i*one i*or i*several i*other i*genes i*at i*different i*loci.



Not i*- i*CORRECT i*ANSWER-Dominance i*is i*______ i*always i*complete.



Heterozygote i*- i*CORRECT i*ANSWER-__________________ i*is i*exactly i*half i*way i*between i*the
i*homozygotes.



Selection i*decisions i*- i*CORRECT i*ANSWER-When i*dominance i*is i*present, i*it i*affects i*our
i*ability i*to i*make i*what?



Selection i*- i*CORRECT i*ANSWER-If i*a i*trait i*is i*controlled i*by i*many i*pairs i*of i*genes i*with
i*additive i*gene i*action, i*it i*will i*be i*easier i*to i*make i*improvement i*through
i*___________________.



Epistasis i*- i*CORRECT i*ANSWER-Interaction i*among i*genes i*at i*multiple i*loci.