Question

the discovery of mitochondrial dna (mtdna) had no effect on which area of scientific investigation?
endosymbiotic theory
inheritance research
forensic science
study of cork bark

Explanation:

• Endosymbiotic theory: Mitochondrial DNA supports the idea that mitochondria were once free - living prokaryotes (as they have their own DNA, similar to bacteria), so it affects this theory.
• Inheritance research: Mitochondrial DNA is maternally inherited, which is an important aspect of inheritance studies.
• Forensic science: Mitochondrial DNA can be used in forensic analysis, especially when nuclear DNA is degraded (e.g., in old or damaged samples).
• Study of cork bark: Cork bark is made of dead cells (cork cells) and does not contain mitochondria (as they are dead). So, mitochondrial DNA discovery has no impact on the study of cork bark.

Answer:

study of cork bark