Question

How would the structure of a fish's DNA compare with the structure of a lion's DNA?

Answer 1

Hint: Deoxyribonucleic acid (DNA) is a molecule made up of two polynucleotide chains that coil around each other to form a double helix that contains genetic instructions for the development, functioning, growth, and reproduction of all known organisms and viruses. Nucleic acids include DNA and ribonucleic acid.

Complete answer:
DNA barcoding methods for fish are used to identify groups of fish based on DNA sequences within specific regions of a genome. These methods can be used to study fish because genetic material, in the form of environmental DNA (eDNA) or cells, is freely diffuse in the water.

This allows researchers to identify which species are present in a body of water by collecting a water sample and extracting DNA from the sample and isolating DNA sequences that are specific for the species of interest.

Barcoding methods can also be used for biomonitoring and food safety validation, animal diet assessment, food web and species distribution assessment, and the detection of invasive species.
African lions' DNA is thus said to be heterozygous (having two different forms of a specific gene, one inherited from each parent), whereas Asian lions' DNA is homozygous (Possessing two identical forms of a particular gene, one inherited from each parent).

The double helix is found all over DNA. AGTC is present in lions, humans, and fish. The double helix is the most stable arrangement for keeping the genome intact in AGTC. The gene structures (i.e., sequence) differ, as do promoters and other elements, but the DNA structure remains constant.

Note: It was discovered that there is clear genetic evidence of recent population fragmentation, which occurs when groups of a species are isolated from each other, by comparing the DNA of lions today to lions from 100 years ago. This fragmentation could have a long-term impact on the iconic species' genetic health.