Animal Taxonomy

Biosystematics trends: Chemotaxonomy,  Cytotaxonomy, Molecular Taxonomy

Complementary genetics: It compares the genome (the DNA in the nucleus) and the plasmid (the DNA outside the nucleus) (the DNA in cytoplasmic organelle). DNA is the most important component of heredity.
The amount of DNA per chromosome set is thought to be constant among animals. However, it is still unclear if variations in the size of heterochromatin segments are responsible for the ratio of DNA content of chromosomes.

Taxonomic Character and Its Types

Taxonomic character
Every biological organism has its unique characters. A taxonomic character is a set of characters that contribute to the description of a taxon.
The taxonomic trait is a property that distinguishes taxa — a feature that distinguishes one type of creature from another. Two beetle species can be distinguished by their punctate elytra.
A taxonomic character is defined by Mayr et al. (1953) as “any property of an organism or a collection of organisms by which it varies from (or resembles) an organism belonging to a different taxonomic category.”