Chapter 17, Evolution of Populations - Assessment - Connecting Concepts - Use Science Graphics/Write About Science - Page 506: 35

In the table shown, you can see that the frequency of allele B is getting replaced by the frequency of allele b over the years.

The table shows that in the year 1910, allele B appeared 81% of the time, while allele b appeared 19% of the time. After 60 years had passed, the frequency of allele B had dropped to only 10%, while the oher 71% got replaced by allele b.