livestock genetics Flashcards
are reproductive traits heritable
no bc there are too many outside factors
example of a codominant trait
roan coloring on shorthorns
sex influenced traits
dominance differs between sexes
example of sex influenced trait
polled is recessive in males and dominant in females
sex limited trait
both sexes carry the gene but only one sex expresses it
Ex. milk production
T or F: Y linked traits occur in both males and females
false since only males can inherit a Y chromosome
qualitative
controlled by a few traits
quantitative
controlled by many traits
heritability
probability of a trait being expressed in the offspring
examples of highly heritable traits
carcass traits
wool traits
athletic ability
intelligence
example of a low heritable trait
reproduction
inbreeding
mating closely related individuals to increase homozygous gene pairs
line breeding
form of inbreeding where animals are not as closely related
outbreeding
mating less closely related animals, can be the same or different breed
crossbreeding
mating 2 animas from different breeds in attempt to get a better offspring
breeding value
estimated value of an individual as a parent
T or F: EPDs can only compare to animals of the same breed
True
where do you look at to determine muscle
ribeye area
EPD accuracy
how likely the EPD is to correctly predict the offspring traits
scale for behavior on an EPD
1-5
what is the most docile ranking on an EPD
1
