IB Biology SL 1.1.5 Applications of DNA profiling Question Bank
Practise IB Biology SL 1.1.5 by explaining how DNA profiling compares band patterns in paternity and forensic cases.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Explain why a child shares approximately half of its DNA markers with a biological parent.
- Compare a crime-scene or family DNA profile and identify the matching band pattern.
- Outline one application of DNA profiling and the evidence required for a conclusion.
D1.1.5—Applications question 1
[Maximum number: 5]
Describe the application of DNA profiling to determine paternity.
a. DNA from child, mother and possible father(s) used to establish paternity;
b. (DNA profiling is done) for legal reasons / divorce / inheritance;
c. (DNA profiling is done) for personal reasons / self-esteem issues for children/fathers/parents;
d. DNA copied/amplified using PCR;
e. DNA cut using restriction enzymes;
f. (gel) electrophoresis used to separate DNA fragments;
g. pattern of bands is produced (in gel);
h. analysed for matches between child with mother and possible father;
i. (about) half the child's bands will match the father (while the other half will match the mother);
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