How is a genetic trait passed from one generation to the next?

through reprodution

Explanation:

when something is reprodused it uses its mother and fathers DNA and/or genetics to make the offspring

When two people create the next generation if the trait is dominant and possessed by one it will commonly be passed down if it is passive then it is a bit less likely to be passe down unless both parents share the trait as 50% of genetic traits come from both sides.