ANSC 4395 BREEDING AND GENETICS
EXAM 4 QUESTIONS AND MARKING
SCHEME GRADED A+
Results *of *selection *are... *- *CORRECT *ANSWER-predictable *in *magnitude *and *direction *
but *prediction *is *only *as *good *as *the *information
Response *to *Selection *- *CORRECT *ANSWER-is *the *genetic *change *that *occurs *as *a *result
*of *selection *
must *take *into *consideration *environment
Response *is *the *function *of *what? *- *CORRECT *ANSWER-heritability *and *the *selection
*differential
Selection *Differential *- *CORRECT *ANSWER-is *the *difference *between *the *mean *performance
*of *the *selected *individuals *and *the *average *of *the *entire *herd
Generation *internal *- *CORRECT *ANSWER-the *length *of *time *it *takes *to *replace *members
*of *1 *generation *in *a *herd *
symbol= *L
the *average *age *of *the *parents *when *any *offspring *is *born
Breeding *Value *- *CORRECT *ANSWER-An *individual's *phenotype *is *the *result *of *its *genetic
*merit *and *the *effect *of *the *environment
Genetic *merit *is *also *called *- *CORRECT *ANSWER-Breeding *Value
An *individual *receives *half *of *its *genetic *make *up *from *both *parents *- *CORRECT
*ANSWER-Expected *BV= *1/2 *sire+ *1/2 *dam
EXAM 4 QUESTIONS AND MARKING
SCHEME GRADED A+
Results *of *selection *are... *- *CORRECT *ANSWER-predictable *in *magnitude *and *direction *
but *prediction *is *only *as *good *as *the *information
Response *to *Selection *- *CORRECT *ANSWER-is *the *genetic *change *that *occurs *as *a *result
*of *selection *
must *take *into *consideration *environment
Response *is *the *function *of *what? *- *CORRECT *ANSWER-heritability *and *the *selection
*differential
Selection *Differential *- *CORRECT *ANSWER-is *the *difference *between *the *mean *performance
*of *the *selected *individuals *and *the *average *of *the *entire *herd
Generation *internal *- *CORRECT *ANSWER-the *length *of *time *it *takes *to *replace *members
*of *1 *generation *in *a *herd *
symbol= *L
the *average *age *of *the *parents *when *any *offspring *is *born
Breeding *Value *- *CORRECT *ANSWER-An *individual's *phenotype *is *the *result *of *its *genetic
*merit *and *the *effect *of *the *environment
Genetic *merit *is *also *called *- *CORRECT *ANSWER-Breeding *Value
An *individual *receives *half *of *its *genetic *make *up *from *both *parents *- *CORRECT
*ANSWER-Expected *BV= *1/2 *sire+ *1/2 *dam
