Why do populations have variaton in certain traits

Populations have variation in traits due to random mutation, crossing over and environmental conditions.

the answer is Different individual have different alleles.

Hope this answer correct :)

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

here is your answer hope i .

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.