Artificial Selection Practice Test

A breeder selects only sheep with the finest wool fibers to reproduce. Fiber fineness is influenced by alleles W (finer) and w (coarser). At generation 0, $f(W)=0.55$. After repeated selection for fineness, $f(W)=0.90$ at generation 7. Which outcome is most likely in the population’s phenotype distribution for fiber fineness at generation 7 compared with generation 0?

In a herd of cattle, breeders allow only the 20% with the highest milk yield to reproduce each generation. Milk yield is influenced by a gene with alleles H (higher yield) and h (lower yield). At generation 0, allele frequencies are H = 0.40 and h = 0.60. After five generations of this breeding practice, the herd’s average milk yield increases and fewer low-yield calves are born. No new animals are introduced. Which outcome is most likely in the herd’s gene pool after five generations of selection?