Here's how it works:

* Incomplete dominance: Occurs when neither allele for a trait is completely dominant over the other. This means that the heterozygous genotype (having one copy of each allele) results in a phenotype that is a mix of the two homozygous phenotypes.

* Example: Imagine a flower where the allele for red color (R) is incompletely dominant over the allele for white color (W).

* A homozygous red flower (RR) will be red.

* A homozygous white flower (WW) will be white.

* A heterozygous flower (RW) will be pink (a blend of red and white).

Other scenarios:

* Codominance: Both alleles are expressed equally, resulting in a phenotype that shows both parental traits simultaneously.

* Polygenic inheritance: Multiple genes contribute to a single trait, leading to a wider range of phenotypes.

It's important to remember:

* Blending of phenotypes is not always the result of incomplete dominance.

* Other genetic factors can also contribute to the expression of traits.