Campbell Biology (10th Edition)

Published by Pearson
ISBN 10: 0321775651
ISBN 13: 978-0-32177-565-8

Chapter 23 - Test Your Understanding - Level 3 - Synthesis/Evaluation: 7

Answer

Please see the image. Hypothesis: in Long Island Sound, mussels of various genotypes at various sites produce larvae which travel around the Sound. lap94-possesing larvae do better in higher salt conditions, in terms of survival, growth, and reproduction, leading to a higher frequency of that allele at higher numbered Sound sites as well as oceanic sites. The cost of expressing lap94 is a dsiadvantage at lower numbered/lower salt sites in the Sound, leading natural selection to reduce its frequency there.
1476930137

Work Step by Step

Your estimate of the numerical allelic frequencies may vary a bit from those shown here-- not a big deal if you get the trend right. Use your imagination to match the saltiness of the water with the frequency of lap94, with its usefulness in tolerating salt but cost in lost-salt habitat.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.