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.

Question

Quizplus · Accepted Answer

A monohybrid cross involves only one character, such as flower color, and the organisms can be either homozygous or heterozygous for that trait. A dihybrid cross involves two characters, such as flower color and plant height, and the organisms are heterozygous for both traits. This means that the dihybrid cross produces offspring that can have four possible combinations of alleles (e.g. CRCT, CRct, crCT, crct), whereas the monohybrid cross produces only two possible combinations of alleles (e.g. CC, Cc). The ratios observed in the offspring are different for each type of cross, with a monohybrid cross resulting in a 3:1 ratio of dominant to recessive traits and a dihybrid cross resulting in a 9:3:3:1 ratio of phenotypes.

What Do We Mean When We Use the Terms Monohybrid