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The difference between the different alleles of a gene is
Sequential Study
Study design that combines cross-sectional and longitudinal techniques.
Longitudinal
Pertains to research or studies that observe the same subjects over a period of time, often to detect changes or developments.
Cross-sectional
A research design that looks at data from a population at a single point in time to identify patterns and associations.
Sequential
Pertaining to events, processes, or items that follow one after another in a specific order.
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