Question
A scientist is tracking the evolution of a gene in giant African snails that determines the direction of the spiral in shells. The following DNA sequence data was taken from a population of giant African snails:
DNA from Snail Parent for Corkscrew Shell Gene:
A
A
T
G
C
G
T
A
T
G
T
T
A
C
G
C
A
T
A
C
DNA from Snail Offspring #1 for Corkscrew Shell Gene:
A
A
T
T
C
G
T
A
T
G
T
T
A
A
G
C
A
T
A
C
DNA from Snail Offspring #2 for Corkscrew Shell Gene:
A
A
T
C
G
T
A
T
G
T
T
A
G
C
A
T
A
C
DNA from Snail Offspring #3 for Corkscrew Shell Gene:
A
A
T
G
C
G
T
A
T
G
G
T
T
A
C
G
C
A
T
A
C
C
DNA from Snail Offspring #4 for Corkscrew Shell Gene:
A
A
T
G
C
G
T
A
T
G
T
T
A
C
G
C
A
T
A
C
Compared to the parent’s DNA sequence, identify the snail offspring that has a substitution mutation in the corkscrew shell gene.
(1 point)
Responses
Offspring #4
Offspring #4
Offspring #1
Offspring #1
Offspring #3
Offspring #3
Offspring #2
DNA from Snail Parent for Corkscrew Shell Gene:
A
A
T
G
C
G
T
A
T
G
T
T
A
C
G
C
A
T
A
C
DNA from Snail Offspring #1 for Corkscrew Shell Gene:
A
A
T
T
C
G
T
A
T
G
T
T
A
A
G
C
A
T
A
C
DNA from Snail Offspring #2 for Corkscrew Shell Gene:
A
A
T
C
G
T
A
T
G
T
T
A
G
C
A
T
A
C
DNA from Snail Offspring #3 for Corkscrew Shell Gene:
A
A
T
G
C
G
T
A
T
G
G
T
T
A
C
G
C
A
T
A
C
C
DNA from Snail Offspring #4 for Corkscrew Shell Gene:
A
A
T
G
C
G
T
A
T
G
T
T
A
C
G
C
A
T
A
C
Compared to the parent’s DNA sequence, identify the snail offspring that has a substitution mutation in the corkscrew shell gene.
(1 point)
Responses
Offspring #4
Offspring #4
Offspring #1
Offspring #1
Offspring #3
Offspring #3
Offspring #2
Answers
GPT-4o mini
To identify which snail offspring has a substitution mutation compared to the parent’s DNA sequence, we should compare each offspring's DNA sequence to the parent's DNA sequence.
**Parent DNA Sequence:**
A A T G C G T A T G T T A C G C A T A C
**Offspring #1:**
A A T T C G T A T G T T A A G C A T A C
- Differences: Position 4 (G -> T) and Position 12 (C -> A)
**Offspring #2:**
A A T C G T A T G T T A G C A T A C
- Differences: Position 4 (G -> C) and Position 12 (C -> G)
**Offspring #3:**
A A T G C G T A T G G T T A C G C A T A C
- Differences: Position 9 (T -> G)
**Offspring #4:**
A A T G C G T A T G T T A C G C A T A C
- No differences compared to parent.
Based on this analysis, the only offspring that has a single substitution mutation, where a base is replaced by another base, is **Offspring #3** (from T to G at position 9).
**Final Answer:** Offspring #3
**Parent DNA Sequence:**
A A T G C G T A T G T T A C G C A T A C
**Offspring #1:**
A A T T C G T A T G T T A A G C A T A C
- Differences: Position 4 (G -> T) and Position 12 (C -> A)
**Offspring #2:**
A A T C G T A T G T T A G C A T A C
- Differences: Position 4 (G -> C) and Position 12 (C -> G)
**Offspring #3:**
A A T G C G T A T G G T T A C G C A T A C
- Differences: Position 9 (T -> G)
**Offspring #4:**
A A T G C G T A T G T T A C G C A T A C
- No differences compared to parent.
Based on this analysis, the only offspring that has a single substitution mutation, where a base is replaced by another base, is **Offspring #3** (from T to G at position 9).
**Final Answer:** Offspring #3