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The diagram shows a section of a chromosome in an insect - HSC - SSCE Biology - Question 9 - 2020 - Paper 1
Question 9
The diagram shows a section of a chromosome in an insect. It represents three genes amongst non-coding DNA. The crosses mark locations of four separate mutations. G... show full transcript
Worked Solution & Example Answer:The diagram shows a section of a chromosome in an insect - HSC - SSCE Biology - Question 9 - 2020 - Paper 1
Step 1
Which location could produce a new allele for eye colour?
Answer
To determine which location on the chromosome could produce a new allele for eye colour (Gene 2), we must consider the mutation locations marked by crosses.
In this case, the potential locations P, Q, R, and S are provided. Since 'R' directly corresponds to Gene 2 (the eye colour gene), any mutations occurring at this location can result in the formation of a new allele for eye colour.
Therefore, the correct answer is:
C. R