Which of the following statements is correct in describing the terms monohybrid cross and dihybrid cross?

A monohybrid cross involves a single parent, whereas a dihybrid cross involves two parents.

A dihybrid cross involves organisms that are heterozygous for two characters that are being studied, and a monohybrid cross involves organisms that are heterozygous for only one character being studied.

A monohybrid cross is performed for one generation, whereas a dihybrid cross is performed for two generations.

A monohybrid cross results in a 9:3:3:1 phenotypic ratio, whereas a dihybrid cross gives a phenotypic 3:1 ratio.