Final answer:
A gene is a section of DNA that is transcribed into mRNA during transcription. The mRNA carries the genetic code to the ribosomes for protein synthesis.
Step-by-step explanation:
A gene is a section of DNA that is transcribed into mRNA during the process of transcription. Transcription is the synthesis of a strand of mRNA that is complementary to the gene of interest.
During transcription, the DNA unwinds and the two strands separate, and the triplets within the gene are used as the template to transcribe the complementary strand of RNA. This mRNA carries the genetic code to the ribosomes, which then use it to synthesize proteins.