What's the difference between "genus" and "genre" or is it pretty the same thing?

Answer 1

Genus is most commonly associated with groupings in biology and zoology. Genre refers more to the arts. They are categories.

Answer 2

When in doubt, look in a dictionary:

genus (noun):
1. Biology. A taxonomic category ranking below a family and above a species and generally consisting of a group of species exhibiting similar characteristics. In taxonomic nomenclature the genus name is used, either alone or followed by a Latin adjective or epithet, to form the name of a species.
2. Logic. A class of objects divided into subordinate species having certain common attributes.
3. A class, group, or kind with common attributes.

genre (noun):
1. A type or class.
2. 1. A category of artistic composition, as in music or literature, marked by a distinctive style, form, or content.
2. A realistic style of painting that depicts scenes from everyday life.

Answer 3

"genus" means origin; "genre" means type or category e.g. Stephen King writes novels in the horror genre.