livestock genetics

Question 1

are reproductive traits heritable

Answer 1

no bc there are too many outside factors

Question 2

example of a codominant trait

Answer 2

roan coloring on shorthorns

Question 3

sex influenced traits

Answer 3

dominance differs between sexes

Question 4

example of sex influenced trait

Answer 4

polled is recessive in males and dominant in females

Question 5

sex limited trait

Answer 5

both sexes carry the gene but only one sex expresses it
Ex. milk production

Question 6

T or F: Y linked traits occur in both males and females

Answer 6

false since only males can inherit a Y chromosome

Question 7

qualitative

Answer 7

controlled by a few traits

Question 8

quantitative

Answer 8

controlled by many traits

Question 9

heritability

Answer 9

probability of a trait being expressed in the offspring

Question 10

examples of highly heritable traits

Answer 10

carcass traits
wool traits
athletic ability
intelligence

Question 11

example of a low heritable trait

Answer 11

reproduction

Question 12

inbreeding

Answer 12

mating closely related individuals to increase homozygous gene pairs

Question 13

line breeding

Answer 13

form of inbreeding where animals are not as closely related

Question 14

outbreeding

Answer 14

mating less closely related animals, can be the same or different breed

Question 15

crossbreeding

Answer 15

mating 2 animas from different breeds in attempt to get a better offspring

Question 16

breeding value

Answer 16

estimated value of an individual as a parent

Question 17

T or F: EPDs can only compare to animals of the same breed

Answer 17

True

Question 18

where do you look at to determine muscle

Answer 18

ribeye area

Question 19

EPD accuracy

Answer 19

how likely the EPD is to correctly predict the offspring traits

Question 20

scale for behavior on an EPD

Answer 20

1-5

Question 21

what is the most docile ranking on an EPD

Answer 21

1