What does it mean if there are two different alleles for a trait?

In a trait of let's say hair color, two alleles can be brown or black hair.
In a trait of skin color, two alleles can be dark or light.
In a flower's trait of petal color, two alleles can be purple or white.

Using these alleles, you can determine offspring traits

This  focuses on  the entrepreneurial leadership of these  growth  firms.   governmentministers can play a critical  role  in  fostering  enterprise and innovation. their  role  is to direct thegovernment  departments and agencies to  focus  on the problem and develop effective policies.