answer; Genetic variation is a term used to describe the variation in the DNA sequence in each of our genomes. ... Individuals of a species have similar characteristics but they are rarely identical, the difference between them is called variation. Updated January 06, 2020. A gene is a portion of DNA that determines a trait. A trait is a characteristic, or a feature, passed from one generation to another, like height or eye color. Genes come in multiple forms or versions. Each of these forms is called an allele
Step-by-step explanation:
Term
Meaning
Evolution
The process by which modern organisms have descended from ancient organisms over time
Common ancestor
An ancestor shared by two or more descendant species
Natural selection
Evolutionary mechanism in which individuals that are better suited to their environment survive and reproduce most successfully
Variation
Difference between traits in individuals of the same species
Adaptation
A trait that improves an organism's ability to survive and reproduce in an environment
Fitness
The ability of an organism to survive and reproduce
Artificial selection
Selective breeding of organisms to promote the appearance of desirable traits in offspring
Genetic drift
A mechanism of evolution in which allele frequencies of a population change over generations due to chanc