can monohybrid cross can be called as incomplete dominance

Dear Student!

Both are two different phenomena.

Monohybrid cross is the cross made while observing only one trait, For example, if tall plants of pea are crossed with short plants then the outcome would be all tall plants. In this case we have studied only one pair of contrasting character hence it is a monohybrid cross. If two pairs of contrasting characters are studied it is known as dihybrid and for 3 it is known as a trihybrid cross. These crosses have got nothing to do with homozygosity or heterozygosity.

Incomplete dominance is the phenomenon where none of the two contrasting alleles or factors is dominant. F₁ individual is a fine mixture of the expression of the two factors. For example in Mirabilis jalapa, two types of flower colours are found in pure state, red and white. When the two types of plants are crossed, the F₁ generation have plants with pink flowers. If the pink flowered plants are selfed, the plants in F₂ generations are of three types-red, pink and white flowered in the ratio of 1:2:1. The genotypic ratio will also be 1:2:1. 
  
Regards.