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Question
State whether true or false.
If you have 20 repeats of the STR sequence, it means that your sibling would have 20 repeats too.
State whether true or false.
If you have 20 repeats of the STR sequence, it means that your sibling would have 20 repeats too.
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Solution
The correct option is B False
The number of STRs is unique for every individual. Though the pattern is inherited, the probability is extremely low (almost nil) for two individuals to have exactly the same number of these repeats. This makes DNA fingerprinting a reliable method of identifying individuals. However, in the case of identical twins, STRs may not be totally reliable, as it is likely that they could be completely similar in them. In such cases, more advanced techniques may be used.
The number of STRs is unique for every individual. Though the pattern is inherited, the probability is extremely low (almost nil) for two individuals to have exactly the same number of these repeats. This makes DNA fingerprinting a reliable method of identifying individuals. However, in the case of identical twins, STRs may not be totally reliable, as it is likely that they could be completely similar in them. In such cases, more advanced techniques may be used.
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