Photo AI
The results from Step 4 are shown in the table below - VCE - SSCE Biology - Question 33 - 2021 - Paper 1
Question 33
The results from Step 4 are shown in the table below. They compare a sequence of 20 bases between the echidna samples. Of the four samples, three were determined to ... show full transcript
Worked Solution & Example Answer:The results from Step 4 are shown in the table below - VCE - SSCE Biology - Question 33 - 2021 - Paper 1
Step 1
Considering the mitochondrial DNA sequences
Answer
To determine which echidna sample is most likely from New Guinea, we need to analyze the differences in mitochondrial DNA sequences among the samples. Comparing the sequences:
- Sample A: ... ATGGCATTGCTCTGGGAAT ...
- Sample B: ... ATTGGCACTGGCTCTGGAT ...
- Sample C: ... ATGGCATTGCTCTCGAAAT ...
- Sample D: ... ATGGCATTGCTCTGGAAT ...
Notably, Sample B has a different base at the second position compared to the others, indicating it may show more genetic divergence, which is often a characteristic of separate geographic populations.
Step 2