Using the concept of a molecular clock and the number of synonymous substitutions shown below, when did species B and C last share a common ancestor?

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
icon
Related questions
Question

#7

Consider the three frog species and their DNA sequences shown below. Based on
fossil evidence, we know that species A diverged from B/C 30 million years ago.
Using the concept of a molecular clock and the number of synonymous substitutions
shown below, when did species B and C last share a common ancestor?
Note that synonymous substitutions are shown in bold and synonymous differences
between species B and C are bold and red.
10 million years ago
20 million years ago
15 million years ago
30 million years ago
Fossil
30 million years old
Frog species A
GAT CAT AAA TTC
Frog species B
GAT CAA AAT TTT
Frog species C
GAT CAC AAC TTT
Transcribed Image Text:Consider the three frog species and their DNA sequences shown below. Based on fossil evidence, we know that species A diverged from B/C 30 million years ago. Using the concept of a molecular clock and the number of synonymous substitutions shown below, when did species B and C last share a common ancestor? Note that synonymous substitutions are shown in bold and synonymous differences between species B and C are bold and red. 10 million years ago 20 million years ago 15 million years ago 30 million years ago Fossil 30 million years old Frog species A GAT CAT AAA TTC Frog species B GAT CAA AAT TTT Frog species C GAT CAC AAC TTT
Expert Solution
steps

Step by step

Solved in 3 steps

Blurred answer
Recommended textbooks for you
Applications and Investigations in Earth Science …
Applications and Investigations in Earth Science …
Earth Science
ISBN:
9780134746241
Author:
Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:
PEARSON
Exercises for Weather & Climate (9th Edition)
Exercises for Weather & Climate (9th Edition)
Earth Science
ISBN:
9780134041360
Author:
Greg Carbone
Publisher:
PEARSON
Environmental Science
Environmental Science
Earth Science
ISBN:
9781260153125
Author:
William P Cunningham Prof., Mary Ann Cunningham Professor
Publisher:
McGraw-Hill Education
Earth Science (15th Edition)
Earth Science (15th Edition)
Earth Science
ISBN:
9780134543536
Author:
Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:
PEARSON
Environmental Science (MindTap Course List)
Environmental Science (MindTap Course List)
Earth Science
ISBN:
9781337569613
Author:
G. Tyler Miller, Scott Spoolman
Publisher:
Cengage Learning
Physical Geology
Physical Geology
Earth Science
ISBN:
9781259916823
Author:
Plummer, Charles C., CARLSON, Diane H., Hammersley, Lisa
Publisher:
Mcgraw-hill Education,