What is a Mendelian trait?
A Mendelian trait is a trait controlled by one locus and gives or shows a simple Mendelian pattern.
Mendelian traits are a tiny minority for all traits , since most phenotypic traits exhibit incomplete dominance, co dominance and contributions from many genes.
Mendelian traits in humans concerns how a child receiving a dominant allele from either parent will have the dominant form of the phenotypic trait or characteristic.
Those that receive a dominant allele from one parent and a recessive allele from the other parent will have the dominant form of the trait.