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VB Sequence Data

ACTSCI-A1SHJ6

Which statement best summarizes the sequence data for the VB gene?


The Coughing Frog

Use the information below, as well as all the other collected data to answer this question.

Upon review of the scientific literature, the doctoral student discovers that there are two coding DNA sequences, known as genes, which lead to the making of proteins key to any frog being able to produce its characteristic croak. One gene product, called VB, allows for proper construction of the tissue that allows the frog to produce the croak. Another gene, called PC, adds a protein compound to the tissue which changed the pitch of the croak, giving each individual species its own particular sound, allowing the finding of a mate to be made easier.

This information sends the doctoral student back to the lab to begin another study. He obtains DNA from the coughing frog, Northern Leopard Frog, and Southern Leopard Frog. This time he uses a DNA sequencer to obtain the order of the nitrogen bases for both the VB and PC genes in each of the frogs. This allows him to obtain the following data:

Organism VB Gene Partial DNA Sequence
Coughing Frog ATGCCCTTATTCGCTACT
Northern Leopard Frog ATGCCCTTAAACGCTACT
Southern Leopard Frog ATGCCCTTAAACGCTACT
Organism PC Gene Partial DNA Sequence
Coughing Frog CCGATCATGGTTTTACCT
Northern Leopard Frog GCGTAGATGGTTTTACCT
Southern Leopard Frog GCGAAAATGGTTTTACCT

Key: A=Adenine, T=Thymine, G=Guanine, C=Cytosine

A

The sequences are identical between all 3 frogs, so they all build the same croaking tissue.

B

There is a difference between the sequences of the Northern Leopard Frog and the Southern Leopard Frog, so these two frogs will build different croaking tissue.

C

The sequences are identical between all 3 species, so the frogs will have the same pitch to their croak.

D

The differences between the coughing frog, Northern Leopard Frog, and Southern Leopard Frog gene sequences show that the coughing frog produces a different croaking part.