Sry to dissapoint but you didn't post anything but the question Answer all of these please<span />
Answer:
Genetic variation means that a specific gene has various alleles. ... Genetic variation makes it possible for a species to exhibit various traits related to that specific gene. Having a variety of traits can help species adapt to different environmental conditions over time.
Explanation:
The term that describes the chromosomal abnormality of having three copies of a single chromosome is triploidy.