1The police collected dna samples from the crime scene to compare with the suspect's profile.
2The discovery of dna structure by Watson and Crick in 1953 revolutionised the field of molecular biology.
3The company offers dna testing services to help individuals learn more about their ancestry and genetic health risks.
4The dna of a species is unique and determines its characteristics, such as eye colour and height.
5Scientists have made significant progress in editing dna using the CRISPR-Cas9 tool, which has potential applications in treating genetic diseases.