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Question
What percentage of DNA sequence is identical among all humans?
Options
Approximately 95% identical
Approximately 100% identical
Approximately 99.9% identical
Approximately 90% identical
MCQ
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Solution
The DNA sequence is approximately 99.9% identical among all humans. This high degree of identity underscores the fundamental genetic unity of humanity, while the remaining 0.1% variation contributes significantly to individual differences and is largely attributed to single-nucleotide polymorphisms (SNPs) and other genetic variants.
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