ANSC 4395 Exam 4 Questions with Verified
Correct Answers
Response to selection
the genetic change that occurs as a result of selection
response
progress resulting from selection
selection differential
the difference between the mean performance of the selected individuals and the average of
the entire herd
heritability
the proportion of the superiority of a group of individuals that is passed on to the offspring
If the goal is to decrease the mean for a trait, then....
the selection differential and response will be negative
generation interval
the length of time it takes to replace the members of one generation in a herd
what is generation interval used for?
it is a function of the reproductive rate of animals and how long a producer is willing to keep
animals in the herd
breeding value
- an individuals phenotype is the result of it's genetic merit and the effect of the environment
- genetic merit can also be called breeding value
, Is the actual breeding value of a individual ever known?
Actual breeding value of an individual is never known
Estimated Breeding Value (EBV) in relation to adding information
- addition of information from relatives will always increase confidence in an EBV
- close relatives result in better BV
- distant relative can be used but will contribute very little
accuracy
- correlation between the the true breeding value and the estimated breeding value
- values from 0-1
P
the average performance of the individual
P Bar
the average performance of the herd
b
a coefficient used in the BV estimate
g
the relationship between the individuals being measured and the individuals from which we
are estimating BV
Individual's own performance
single most important piece of info for estimating breeding value
Multiple records on an individual
Correct Answers
Response to selection
the genetic change that occurs as a result of selection
response
progress resulting from selection
selection differential
the difference between the mean performance of the selected individuals and the average of
the entire herd
heritability
the proportion of the superiority of a group of individuals that is passed on to the offspring
If the goal is to decrease the mean for a trait, then....
the selection differential and response will be negative
generation interval
the length of time it takes to replace the members of one generation in a herd
what is generation interval used for?
it is a function of the reproductive rate of animals and how long a producer is willing to keep
animals in the herd
breeding value
- an individuals phenotype is the result of it's genetic merit and the effect of the environment
- genetic merit can also be called breeding value
, Is the actual breeding value of a individual ever known?
Actual breeding value of an individual is never known
Estimated Breeding Value (EBV) in relation to adding information
- addition of information from relatives will always increase confidence in an EBV
- close relatives result in better BV
- distant relative can be used but will contribute very little
accuracy
- correlation between the the true breeding value and the estimated breeding value
- values from 0-1
P
the average performance of the individual
P Bar
the average performance of the herd
b
a coefficient used in the BV estimate
g
the relationship between the individuals being measured and the individuals from which we
are estimating BV
Individual's own performance
single most important piece of info for estimating breeding value
Multiple records on an individual
