In a certain population of finches, a single gene controls beak length. There are two possible alleles: S, which leads to a short beak, and L, which leads to a long beak. Individuals with the genotype SS will have a short beak, individuals with the genotype LL will have a long beak, and individuals with the genotype SL will have a medium-length beak. Scientists measure that in this population of 1,128 total birds, 321 birds have short beaks, 562 have medium-length beaks, and 245 have long beaks.
Ten years later, the measurements are repeated. This time, there were 1,346 birds in the population. 452 have short beaks, 699 have medium-length beaks, and 195 have long beaks.
Use the passage to answer the question.
Based on the data collected 10 years later, is this population of finches currently evolving? How do you know?
yes because more individuals in the population exhibit the SS genotype than would be expected if the population was in Hardy-Weinberg equilibrium
no because the number of individuals that exhibit the SL genotype matches that would be expected if the population was in Hardy-Weinberg equilibrium
no because fewer individuals in the population exhibit the SS genotype than would be expected if the population was in Hardy-Weinberg equilibrium
yes because more individuals in the population exhibit the LL genotype than would be expected if the population was in Hardy-Weinberg equilibrium