ANSWER:-
POLYGENIC INHERITANCE:-
☘ Mendel assumed that each trait is controlled by two genes.
☘ The two genes associated with this process are located st the same locus of the chromosome.
☘ Certain traits are controlled by more than two genes located at different loci and are called multiple genes.
☘ Multiple genes are also known as polygenes.
☘ In polygenic inheritance, the intensity of the trait depends upon total number of genes involved.
☘ Genes that are involved in polygenic inheritance are called cumulative genes.
☘ Polygenic trait is usually controlled by more than one pair of non allelic genes.
☘ It shows different types of phenotypes.
☘ Inheritance of skin colour in human is an example of polygenic inheritance.
☘ It was studied by Davenport.
☘ According to him, three pairs of genes controls the skin colour.
