Insects play important roles in biological research. For example, because of its small size, short generation time and high fecundity, the common fruit fly Drosophila melanogaster is a model organism for studies in the genetics of higher <answer>eukaryotes</answer>. D. melanogaster has been an essential part of studies into principles like genetic linkage, interactions between genes, chromosomal genetics, development, behavior and evolution. Because genetic systems are well conserved among <answer>eukaryotes</answer>, understanding basic cellular processes like DNA replication or transcription in fruit flies can help to understand those processes in other <answer>eukaryotes</answer>, including humans. The genome of D. melanogaster was sequenced in 2000, reflecting the organism's important role in biological research. It was found that 70% of the fly genome is similar to the human genome, supporting the evolution theory.
Genetic systems are conserved among what?
eukaryotes