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Biology HW

22. A researcher has prepared an extract from cells and wants to capture single-stranded DNA fragments that have the base sequence TACGCATGGAAT. What DNA strand could she synthesize and attach to a microarray to act as a trap for the target DNA? Explain your reasoning.


23. The gene for sickle-cell anemia has an overall harmful effect in an individual with a homozygous genotype but can have an overall helpful effect in an individual who has a heterozygous genotype. Explain how this is possible.

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