Gene flow occurs when individuals move into or out of a population, and gene flow is the movement of alleles in or out of a population. Given these facts, what occurs when individuals move into a population among the following options:
- resistance
 - spread flower seeds
 - rapid expansion
 - alleles move in
 - Leptospirosis
 - survival
 - competition
 - permineralization


 

    alleles move in     