Genetics question 1:
a) In a population of cattle, the average body fat percentage is
11.1%. You select parents with an average body weight percentage of
29.7%. The offspring they produce have an average body weight
percentage of 16.7%. Based on these data, what is the narrow-sense
heritability of this trait? Enter your answer as a decimal to the
nearest 0.01.
b) In a population of pigs, the average body weight is 184
kg. The narrow sense heritability for this trait is
h2 = 0.7. If you were to select pigs that have an
average weight of 176 kg to breed, what would be the
predicted weight of their progeny? Enter your answer to the nearest
0.1 kg.
c) In a F2 intercross to investigate the genetic basis of
fruit weight, it was found that 1 out of every 256 plants in the F2
generation had the same weight as one of the original parents.
Based on these data, approximately how many genes control variation
in this trait?
d)
Phenotypic variation in tail length of unicorns has the
following components:
Additive genetic variance
= 289
Dominance genetic variance
= 215
Environmental variance
= 232
What is the broad-sense heritability for tail length in these
unicorns? Enter your answer to the nearest 0.01.