Final answer:
The correct binomial format is Genus species, where the genus name is capitalized, the species name is lowercase, and both are usually italicized.
Step-by-step explanation:
The correct format for binomial nomenclature is Genus species. In binomial nomenclature, the first part of the name indicates the genus to which the organism belongs, while the second part identifies the species within the genus. For example, in the scientific name Homo sapiens, Homo represents the genus, and sapiens specifies the species. The genus name is always capitalized, and the species name is always in lowercase. Both parts should be italicized when written in print or underlined when handwritten to indicate their Latin origin.