UIUC ANSC 400 MIDTERM 2 QUESTIONS WITH VERIFIED
ANSWERS
PTA stands for ____ _____ ____. - Answers - Predicted Transmitting Ability
Define PTAs - Answers - An estimate of genetic superiority or inferiority that a bull or
cow will transmit to their offspring for a given trait.
T/F A bull with PTAM + 2,622 lb. means that his daughters will produce 2,622 lb. more
per lactation than her herd mates. - Answers - True
Phenotype = Genetics + ____________________ - Answers - Environment
A farmer is looking to have his cows last more in the herd. Would you suggest a farmer
have a higher or lower number for the bull trait Productive Life (PL)? - Answers - High
How do you determine the number of contemporary groups? - Answers - Group by
calving dates
How long is the cow's average estrus cycle? - Answers - 21 days
T/F Cows in estrus have high circulating concentrations of progesterone (P4). - Answers
- False
T/F Cows in estrus will stand to be ridden. - Answers - True
How long is the usual voluntary waiting period (VWP)? - Answers - 45-60 days
Prostaglandin (PGF2a) is synthesized in the uterus of the cow and is the hormone that
causes luteolysis. - Answers - True
T/F The presence of a dominant follicle is associated with high circulating
concentrations of estradiol (E2). - Answers - True
T/F The Ovsynch protocol improves service rate when compared with non-synchronized
cows. - Answers - True
The Ovsynch protocol improves service rate, not ______ rate. - Answers - pregnancy
We know that bacteria don't fly. In order to cause mastitis, they need to first colonize
the... - Answers - teat
T/F Oxytocin is produced by the posterior pituitary and has the myoepithelial cells as a
target. - Answers - True
ANSWERS
PTA stands for ____ _____ ____. - Answers - Predicted Transmitting Ability
Define PTAs - Answers - An estimate of genetic superiority or inferiority that a bull or
cow will transmit to their offspring for a given trait.
T/F A bull with PTAM + 2,622 lb. means that his daughters will produce 2,622 lb. more
per lactation than her herd mates. - Answers - True
Phenotype = Genetics + ____________________ - Answers - Environment
A farmer is looking to have his cows last more in the herd. Would you suggest a farmer
have a higher or lower number for the bull trait Productive Life (PL)? - Answers - High
How do you determine the number of contemporary groups? - Answers - Group by
calving dates
How long is the cow's average estrus cycle? - Answers - 21 days
T/F Cows in estrus have high circulating concentrations of progesterone (P4). - Answers
- False
T/F Cows in estrus will stand to be ridden. - Answers - True
How long is the usual voluntary waiting period (VWP)? - Answers - 45-60 days
Prostaglandin (PGF2a) is synthesized in the uterus of the cow and is the hormone that
causes luteolysis. - Answers - True
T/F The presence of a dominant follicle is associated with high circulating
concentrations of estradiol (E2). - Answers - True
T/F The Ovsynch protocol improves service rate when compared with non-synchronized
cows. - Answers - True
The Ovsynch protocol improves service rate, not ______ rate. - Answers - pregnancy
We know that bacteria don't fly. In order to cause mastitis, they need to first colonize
the... - Answers - teat
T/F Oxytocin is produced by the posterior pituitary and has the myoepithelial cells as a
target. - Answers - True
