He then switched his investigations to peas but, as his observations were published in a somewhat obscure botanical journal, they were virtually ignored for over 35 years until they were rediscovered in the early 20th century. In the 19th century Gregor Mendel carried out his early investigations of inheritance on mouse coat color but was asked by his superior to stop breeding in his cell 'smelly creatures that, in addition, copulated and had sex'. During the 18th century Joseph Priestley and Antoine Lavoisier both used mice to study respiration. Mice have been used in biomedical research since the 17th century (from May 30, 1678) when William Harvey used them for his studies on reproduction and blood circulation and Robert Hooke used them to investigate the biological consequences of an increase in air pressure. Other mouse species sometimes used in laboratory research include two American species, the white-footed mouse ( Peromyscus leucopus) and the North American deer mouse ( Peromyscus maniculatus). Lab mice sold at pet stores for snake food can also be kept as pets. The laboratory mouse genome has been sequenced and many mouse genes have human homologues. This close relationship, the associated high homology with humans, their ease of maintenance and handling, and their high reproduction rate, make mice particularly suitable models for human-oriented research. Mice belong to the Euarchontoglires clade, which includes humans. They are the most commonly used mammalian research model and are used for research in genetics, physiology, psychology, medicine and other scientific disciplines. Laboratory mice are usually of the species Mus musculus. The laboratory mouse or lab mouse is a small mammal of the order Rodentia which is bred and used for scientific research or feeders for certain pets.

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