ANSC 4395 BREEDING AND GENETICS EXAM 4
QUESTIONS & CORRECT ANSWERS
Accuarcy is ___________ for individual records if the heritablility
is at least moderate - correct answer- fairly high
Accuracy - correct answer- is the confidence
-correlation between the true bv and the EBV
- will always be between 0-1 but never exactly 1 or 0
- the higher the better
Accuracy is always higher for large # of records when selection is
based on multiple records for an individual - correct answer-
increase is most pronounced when H^2 and repeatablility are
low
Accuracy is higher for _________ levels of heritablility - correct
answer- higher
Accuracy is higher for traits with a higher ___ - correct answer-
H^2
, accuracy is never ________ when pedigree info i sused - correct
answer- high
An individual receives half of its genetic make up from both
parents - correct answer- Expected BV= 1/2 sire+ 1/2 dam
Breeding Value - correct answer- An individual's phenotype
is the result of its genetic merit and the effect of the
environment
Each additional record - correct answer- adds to the
accuracy of the EBV
Estimated Breeding Value - correct answer- - actual breeding
value of an individual is never known
- can be estimated from an individuals performance and the
performance of its relatives
the clser relationship the better the estimates
-progeny, full sibs, half sibs, grand parents
Generation internal - correct answer- the length of time it
takes to replace members of 1 generation in a herd
QUESTIONS & CORRECT ANSWERS
Accuarcy is ___________ for individual records if the heritablility
is at least moderate - correct answer- fairly high
Accuracy - correct answer- is the confidence
-correlation between the true bv and the EBV
- will always be between 0-1 but never exactly 1 or 0
- the higher the better
Accuracy is always higher for large # of records when selection is
based on multiple records for an individual - correct answer-
increase is most pronounced when H^2 and repeatablility are
low
Accuracy is higher for _________ levels of heritablility - correct
answer- higher
Accuracy is higher for traits with a higher ___ - correct answer-
H^2
, accuracy is never ________ when pedigree info i sused - correct
answer- high
An individual receives half of its genetic make up from both
parents - correct answer- Expected BV= 1/2 sire+ 1/2 dam
Breeding Value - correct answer- An individual's phenotype
is the result of its genetic merit and the effect of the
environment
Each additional record - correct answer- adds to the
accuracy of the EBV
Estimated Breeding Value - correct answer- - actual breeding
value of an individual is never known
- can be estimated from an individuals performance and the
performance of its relatives
the clser relationship the better the estimates
-progeny, full sibs, half sibs, grand parents
Generation internal - correct answer- the length of time it
takes to replace members of 1 generation in a herd
