Learning objective
Explain how DNA differences between individuals can be used for identification and diagnosis.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Control of gene expression official content
Subtopic
Differences in DNA between individuals of the same species can be exploited for identification and diagnosis
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Quick explanation
Explain how DNA differences between individuals can be used for identification and diagnosis
- This point belongs to Control of gene expression official content, especially Differences in DNA between individuals of the same species can be exploited for identification and diagnosis.
- You need to be able to explain how DNA differences between individuals can be used for identification and diagnosis.
- The key ideas to know are diagnosis.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Differences in DNA between individuals of the same species can be exploited for identification and diagnosis to exam-style questions, flashcards, and revision notes for Control of gene expression official content.
Quick student answer
Which of the following techniques is primarily used to amplify specific DNA sequences for analysis?
Direct answer
Polymerase chain reaction (PCR) is the technique used to amplify specific DNA sequences.
Key terms
- DNA profiling: A technique used to identify individuals by analyzing the unique patterns in their DNA.
- genetic marker: A specific DNA sequence with a known location on a chromosome that can be used to identify individuals or species.
Common trap
Confusing SNPs with mutations: SNPs are a type of genetic variation that occurs commonly in the population, while mutations are rare changes in the DNA sequence.
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Explain how base-sequence changes can alter amino acid sequences.
Alteration of the sequence of bases in DNA can alter the structure of proteins
- Relate altered amino acid sequences to protein structure and function.
Alteration of the sequence of bases in DNA can alter the structure of proteins
- Explain how mutations can affect phenotype.
Alteration of the sequence of bases in DNA can alter the structure of proteins
- Interpret mutation information in unfamiliar contexts.
Alteration of the sequence of bases in DNA can alter the structure of proteins
- Explain that cell specialisation results from translation of only part of the DNA.
Most of a cell's DNA is not translated