Selection within herds or flocks where all prospective breeding animals receive the same
management reduces variation in animal performance and provides greater accuracy in
selection.
A. True B. False
Question 2The gene for the polled trait (P) is dominant and the gene for horns (p) is recessive.
Therefore, the dominant gene will mask the expression of the gene for horns.
A. True B. False
Question 3Mastitis (inflammation of the mammary gland) is the most prevalent udder health
problem.
A. True B. False
Question 4When cows are fed feeds that impart strong flavors into the milk, they should be milked
within one to two hours after eating.
A. True B. False
Question 5When an animal becomes nervous or frightened, interruption of milk let-down can occur
due to the release of epinephrine and norepinephrine into the bloodstream.
A. True B. False
Question 6The principal hormone involved in milk let-down is:
A. somatotropin B. relaxin C. oxytocin
Question 7Lactose, or milk sugar, is composed of galactose and:
A. maltose B. fructose C. glucose
Question 8Inverted nipples are nonfunctional and of particular concern when selecting:
A. heifers B. ewe lambs C. gilts
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