Figure 1. Sampling sites of marine mussels at various locations (1-8) in Long Island Sound and the Atlantic Ocean
TABLE 1. PERCENT OF INDIVIDUALS POSSESSING lap94 ALLELE
|
Long Island Sound |
Atlantic Ocean |
Site |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
lap94 frequency (%) |
13 |
16 |
25 |
37 |
55 |
59 |
59 |
59 |
Salinity |
|
High |
Leucine aminopeptidases (LAPs) are found in all living organisms and have been associated with the response of the marine mussel, Mytilus edulis, to changes in salinity. LAPs are enzymes that remove N-terminal amino acids from proteins and release the free amino acids into the cytosol. To investigate the evolution of LAPs in wild populations of M. edulis, researchers sampled adult mussels from several different locations along a part of the northeast coast of the United States, as shown in Figure 1. The researchers then determined the percent of individuals possessing a particular lap allele, lap94, in mussels from each sample site (table 1).
On the axes provided, construct an appropriately labeled bar graph to illustrate the observed frequencies of the lap94 allele in the study populations.