What do we mean when we use the terms monohybrid cross and dihybrid cross?
a) a monohybrid cross involves a single parent, whereas a dihybrid cross involves two parents.
b) a monohybrid cross produces a single progeny, whereas a dihybrid cross produces two progeny.
c) a dihybrid cross involves organisms that are heterozygous for two characters and a monohybrid cross involves only one.
d) a monohybrid cross is performed for one generation, whereas a dihybrid cross is performed for two generations.
e) a monohybrid cross results in a 9: 3: 3: 1 ratio whereas a dihybrid cross gives a 3: 1 ratio.

The answer is C) A dihybrid cross involves organisms that are heterozygous for two characters and a monohybrid cross involves only one.

A dihybrid cross considers two traits, while a monohybrid cross considers one trait to be inherited.
The other statements cannot be true because of the following:
A) Both monohybrid and dihybrid cross involves two parents.
B) There is more than one progeny in both monohybrid and dihybrid cross, and the number depends on parental genotypes.
D) Both monohybrid and dihybrid cross are performed for two generations.
E) A monohybrid cross results in a 3:1 ratio whereas a dihybrid cross gives a 9:3:3:1 ratio.